Chris
right
don't bother with Full HD unless you can spend more money.
Lots of manufacturers are making full HD panels which are 1080p on static images, but go BELOW 720p when things start to move. It's a buzz word, like selling a Punto, calling it a turbo, then finding it runs 1psi of boost!
I dont sell LG, Samsung or any of that Korean crap. Despite what the reviews say.
For me its either Sony, Toshiba, or most often, Panasonic.
Fact is you want as deep a contrast ratio as possible (8000-10,000 on LCD) and if budget allows, you NEED 100hz OR Plasma
For your budget i'd suggest Panasonic Plasma.
10,000:1 contrast Ratio, near 100hz performance, HD Ready
Award winning set is the TH-37PX70
currently an outgoing model so LOTs of deals going on at the moment. Should be some dealers offering these below £600. Make sure you get a pedestal model if you aren't wall mounting.
don't be spellbound by Full HD, glossy surrounds and other folly. Concentrate on a DECENT foundation and good performance in all aspects.
Hope that helps
mook
btw 360 looks AWESOME on this set.