FFS people, grow up...
They are both good cards, but from every review that I personally read on the subject the 6800GT offered better value for money.. (and I read quite a few reviews, both online & in magazines)
So I purchased an XFX 6800GT and am completely happy with it. to the point that if someone offered me a swap for an x800 + cash , I would tell them to take a walk
I initally benchmarked an Aquamark 03 of 62,948 with both my card & pc (AMD64 3200+) running at stock speeds - I've had over 64,000 when I tried the base ultra overclock settings 400/1.1 - using 61.21 drivers & DX9.0b
upgrading to 61.77 & DX9.0c lowered my score to 61,456, but hey it's still 18,000 over my old 9800pro
all my games run great @ 1280x1024 with max details, max AA & max AF.
I'm even running FarCry with SM3.0 and it's stunning
. The only problem is that you spend far to much time looking at the scenery and die quite alot
From reviews that I have seen the x800pro ATI cards are similar in speed (within a few fps) as the 6800's (sometimes better when max AA & AF are applied).
so stop all this mine better than yours rubbish, and buy the card that you think is the best for you system.