That Guy on 13 April 2007
whatever you choose, consider it to be an investment. Ask yourself "will I be happy with my purchase 5-6 years from now? Will the picture still look really good by then?" You don't want to get something because it was a couple of GBP cheaper, but then its crap after 2 or 3 years.
I'm no expert on HD, so I would recommend what that other guy said, look at reviews and go to av enthusiast forums. Hopefully an enthusiat forum that is devoid of fanboys 
Essay Pro