i like my X800XL
i stayed with nvidia upto the GF4 line but it seams when ati brought the ati9700 pros i just loved ati then
i havent tried any of the 6800/7800 series cards and it dont really matter to me as mt atis 9700,9800,9550 (nice OC card) and even this X800XL i just catn really complain
i love the AA not taking big perf hits
one thing about nvidia though (its good for open gl games and linux)
nvidia and linux just love eachother
i had a chance the other day to trade my ATI X800XL in (less then 30days since i bought it) for same exact price 6800GT OC (and a free game for $49.00) but i just didnt want to do it (i read alot of reviews and comparisons) and from what i read X800XL wins out over 6800GT OC
BUT if that card can be put in SLI then i would prob get that card if i had a PCI X mboard
if you have a new PCI X mboard i would definately get nvidia for the SLI