[ED A]

I am moving to HK in July. Have a great Sony HDTV. I know that the TV's NTSC tuner will not work in Hong Kong. Will it be possible to find a separate tuner box in HK to work with the TV set up as an HD monitor? I am aware of the voltage difference and how to deal with it.

[Badzoo]

I know little about HDTV device, if it has a VGA port which can be possible, you can plug a product like Compro Videomate V550
http://www.comprousa.com/New/en/tvbox.html
It's a standalone TV turner box that was aimed to use the LCD monitor as a TV (there is a new version for 1680x1050 resolution support).
But I think there might be another simple solution, like you have a DVD/HDD recorder or this kind of stuff and there is a built-in tuner, therefore you can watch tv through the turner of the recorder.
Hope it helps

[PDLM]

Only the 4 terrestrial broadcast channels will be an issue (and only 2 of them are in English). You'll get 99% of your TV from Cable/IPTV and that comes from their decoder to your TV on a composite video or similar, so no problem there.