the top end cards are very very expensive but as wat codine sed along with the x850xt, x850xt PE 6800ultra EE they are all very similar and when ur playing any game they will all look the same cos no game atm has enough detail to show them apart so if i had the money to buy any of them, which of course i dont, i would get the eVGA 6800GT. and overclock it to the 6800ultra speeds. if i were to get the x800 i wouldnt know where to start cos i dont know how the radeons overclock and wouild have to look alot into it.
all of these cards are amazing cards.