compare LCD's all have the same display works or it doesn't, what is important are the electronics - switches, tuner, amount of input/outputs & reliability - do a search for LCD customer feed back to see who has what braking.
I wouldn't(& didn't) spend more than $500 - I caught an Emprex 32" LCD on sale(@ Fry's a year ago) & the 5 tear extended contract was $60. (check wallyworld on their price)
The best HD performance is Plasma(but they're pricey)