I think a 5 days trip is the best way like for Prague. 70 euros per day could be sometimes not enought because of restaurant... they not bery cheap.. but if you choose not in the centre it would be more expensive, of course.

We stayed for 4 nights in Prague and think it was more than enough. Do you love bustling city? Prague has load and load of tourists, and June is almost the starting of the holiday period, so be prepared for crowd. Have you thought of making day trip to cesky krumlov and kutna hora? Both are excellent place to visit if you like to escape the crowd in Prague.
http://www.fodors.com/community/europe/prague-cesky-krumlov-vienna-budapest-trip-report.cfm

<< I am not a museum person at all >>

Can you clarify - You won't go into any buildings that are museums? You won't go into any type of museum? Will you go into the Synagogues? These are museums.

I'm a leisurely traveler and I think you have way too little planned, especially as you are only going into churches.

Prague is a beautiful city and there is magnificent architecture to look at (if you're interested in that).

Perhaps you could take a walking tour to fill some of the time.

Since you like churches get to St. Vitus early, when they first open, to avoid the long lines later in the day.

I absolutely recommend the Loreto church.

http://www.prague.net/itineraries-in-prague
this link will give you an idea of itinaries that you can do.The whole website has loads of great info on it though some of the entrance prices and opening times may be a bit out of date.
I can second a trip to the Loretto and nearby is the Strahov Library which is stunning.
Smichov is really a big residential /Indistrial area , the huge Staropramen Brewery is here as well as a major train station and bus station.Lots of shops and resturants in the nearby Andel area including a huge mall.
Vysehrad is lovely and a real peaceful place compared to other parts of the city ,I would also suggest a visit to Letna park for the stunning views of the Prague bridges ,if you have ver seen pics of the Prague bridges they will have been taken from Letna park, there are sevral cafe/restuarts there as well as a huge beer garden dso worth a trip up there for the views and sit in the beer garden to see the real Praguers

Thanks Criscollin and Styrx for your reassuring comment and trip report.

Thanks Adrienne. By museums I mean, buildings whose only purpose is to show a collection of art pieces that have been gathered there.

For me, a city is about atmosphere and not about monuments. I've been to Venice a couple of times, and what I love about it is its atmosphere, even though it is also crowded. However, all I've done while beng there is stroll around, visit a church here and there, do some shopping, sit at a square while having an ice cream, etc. I've never visited any of its art galleries or palaces, and despite this, I wouldn't say that they were essential for me to experience Venice. For me, the life of a city is in its streets, markets, parks, etc.; not in a building filled with paintings or sculptures and a crowd of tourists. I love admiring and enjoying architecture, that's why I've chosen to visit Prague.

Thanks Unclegus for the link and recommendation.

Thanks everybody for the recommendations and input.

Orlando

Prague really is a lovely city to wander around, very safe,get yourself a 24hr transport ticket jump on a tram for a few stops and have a wander ,once you have had enough of that ,jump on a tram to another area.Vinohrady is veru nice with lots of older buildings and I like the Dejvicka area of the city ,more residential and where i usually stay when in the city,but ilike the pubs in that area, lots of nice park lands as well, I have already mentioned Letna, but Riegroovy Sady,Havlickovy sady and Stramovka park are all very nice and relatively easy to get to by public transport

Thanks Unclegus (and also for your comments on the Thorntree Forum).

A question: does the castle really take up a full day to visit? I've been suggested to visit the Castle and the Lesser Quarters together, but I am wondering about the time I should allocate for the castle because that's what I've read. I also read couple of threads saying that, for them, St. Vitus is the only highlight to be visited in the castle and that the rest was not that interesting. What do you think?

Thanks again,

Orlando

Just depends what you want to do in the catle area.It is not a castle in the true sense of the word but a fortified area with numerous buildings and some goverment work still goes on there.You can wander round the area for a whikle withiut actualyy visiting the interior of any building and you can get access to parts of St Vitus Catherdral for free.If you are not a museum person the just stroll around the area and make a vist to St Vitus all for free,if you want to see interiors then buy a ticket I think there are 2 sort of tours a short one and a longer one thats gets you into various places(I think you can use it over 2 days).If doing the castle area go early as it can get really busy. I love Golden lane and there is a great armoury museum there as well as a place you can have a shot of an old fashioned Crossbow,there are also loads of shops in this area but there is a fee to get in usually included in the tour price.
I think you could easily do the two areas in one day , start at the castle then stroll down the hill.

If you head up to the castle area by tram (no 22) take the tram 2 stops past the castle to Pohorelec, this is near the Strahov monestry as as you walk gently down hill to the castle you will pass the stunning Loretto building.

Thanks, Unclegus, for the castle, neighborhood and park recommendations.

I feel much more confident about my 6 nights in Prague. Plus, by staying off Wenceslas Square, I will have good subway connections. According to my new plan, I roughly have:

Day 1: Arrival
Day 2: It depends on how I feel due to jetlag. I'll probably walk around or visit a park or something to get my bearings.
Day 3: Lesser and Castle Quarters
Day 4: Old Town and Jewish Quarter
Day 5: New Town and Vysehrad
Day 6: Whatever I couldn't do before, or one of the great suggestions given by all of you or a day trip.

Thanks again everybody... I am very looking forward to this Prague & Madrid trip.

Orlando

I am sure you will have a wonderful time,the weather should be nice,i would try and make a trip to one of the beer gardens one evening ,the one in Letna is great and you can sit out relax have a drink and get a view across the city.
I have just booked up for my Beer Festival trip and will be in Prague during the last week of May.

I wouldn't agree with whoever claimed there was nothing of interest in the castle complex but the church. I found the palace and basilica to be of interest, as well as the picture gallery although I know you don't like art.

I think you have a misunderstanding of what a museum is, maybe you haven't been to many. There are many museums that are not solely for art, in fact, that is usually called a gallery (if it is just paintings). There are some good museums in Prague that are not art museums, but if you don't like going in buildings, it doesn't matter (the Prague city history museum is excellent, for example, one of the best I've seen in any city). But if you don't like going in buildings, there's enough other things to do.