HK has tons of things to do....interesting streets to walk, shopping, sights, the peak, the islands, macau, etc... no lack of things of interest....get a guidebook to start...

air asia flies between the two places i believe....thai air does too and cathy pacific... look at bangkok air as well..

no need for a personal guide in HK...

HKG-BKK is the international route served by most airlines in the world, with about 20 flights a day combined. And all can carry passengers just between HKG and BKK.

Cathay Pacific
Thai Airways
Orient Thai
Thai AirAsia
China Airlines
Hong Kong Airlines
Bangkok Airways
Sri Lankan Airlines
Ethiopian Airlines
Kenya Airways
Royal Jordanian
Emirates

And if you're going to Macau, you can also fly MXM-BKK on Air Macau (1x daily) or Thai AirAsia (3x daily).

great list ray

As an intial matter, if you have a choice, I would pick July in Hong Kong over April. While July is hotter and can have more rain, April tends to be quite foggy and damp. You could be socked in at the Peak and see nothing. While that can of course happen in July, the chances of good visibility are better in July, IMO. (I have lived in Hong Kong for 10 years.)

If you are here on July 1, there are sometimes fireworks in the harbour to celebrate Reunification with the PRC. Not every year, but if you can be here then and they have the fireworks, it's a great addition to a trip.

If you are here 5-7 nights, you could easily do a night in Macau which would be an interesting change. It is lots more than just casinos (which I avoid in any event).

For ideas on what to to, click on "Destinations" above, and then scroll down to Hong Kong. A helpful description and basic itinerary suggestions will come up. The Fodors guide book to Hong Kong is excellent. Frommers.com also has a website with similar info and their guidebook is pretty good. You can get the 6-page fold-out paper Luxe Guide, see http://www.luxecityguides.com/; however there is very little sightseeing advice in it, it is mostly shopping and restaurants. Also check the Hong Kong Tourism Board website at http://www.discoverhongkong.com/eng/ for other ideas, as well as the Leisure and Cultural Services Department website at http://www.lcsd.gov.hk/en/home.php to see all events and museums offered by the government.

Hong Kong is WAY more than shopping, which is many cases is actually better in Bangkok, esp for handicrafts. The days of dirt cheap shopping for "seconds" from factories does not really exsit anymore, as most factories have moved to the PRC or Bangaldesh, etc. Jewelry is probably a bit cheap still in Bangkok, but bargains can be found here, esp in Chinese pearls. Please search this board for my list of personal reccos called “Cicerone’s Reccos for What the Locals Do for Fun in Hong Kong (Hint: We DON’T Go to those Awful Night Markets....)” this should give you some ideas for what to do, including a list of walks and some sources for more walks. For a quick photo of one walk, click on my name above and see my profile. For a description of some of other favourite walks on Hong Kong Island, see my posts called “Cicerone’s Favourite Hong Kong Walks II: Paradise Found! From Happy Valley to Stanley in High Heels! (Almost) The Tsz Lo Lan Shan Path” and “Cicerone's Favourite Hong Kong Walks III: The Dragon's Back” and “Cicerone's Favourite Hong Kong Walks: Severn Road, The Peak “. You can find all of these posts by clicking on these links:
http://www.fodors.com/community/asia/cicerones-reccos-for-what-the-locals-do-for-fun-in-hong-kong-hint-we-dont-go-to-those-awful-night-ma.cfm http://www.fodors.com/community/asia/cicerones-favourite-hong-kong-walks-ii-paradise-found-from-happy-valley-to-stanley-in-high-heels-alm-1.cfm
http://www.fodors.com/community/asia/cicerones-favourite-hong-kong-walks-iii-the-dragons-back.cfm and at http://www.fodors.com/community/asia/cicerones-favourite-hong-kong-walks-severn-road-the-peak.cfm.

Other than that, I would need to know what your interests are to make more specific suggestions. Some people think that Chinese Opera is a “must see”. Some people think that Bruce Lee movies would be. Some people think eating in a local Michelin-ranked restaurant would be. It’s really a matter of what interests you.

I have a list of restaurant recommendations for Hong Kong which is about 40-pages. It is broken down by view, no view, area, price and food type/region. I would be happy to e-mail it to you if you want to send me a message at ciceronehongkong@live.hk. I also have a shopping guide.

Not sure tailors are worth the time and trouble, as for a good one you will pay the same or more than off the rack, but will get a great fit and great materials. But not cheap. Possible exception may be men's dress shirts which probably still are a good deal. There is a thread on tailors, I can search for it and try to post the link. I also discuss tailors in my shopping guide.