I said before, its a guideline.. if u want to nit-pick on levels, then I admit it wont go all that well with 6xAA.. but comparatively 8xAA will stuter on most levels..
The point here is to guide the guy make a valid judgement.. Both cards have their merits. 7900GT runs cooler, its smaller, it overclocks well and it provides near similar performance in most titles.
The X1800XT has HDR+AA and have HQ AF, a not-as-nice-as-8xAA 6xAA that will work with most games and not have a headache playing it.
So if he's not fitting the thing into a shuttle, I fail to see the reason why anyone would dismiss an X1800XT as an equivalent option. The noise it generates during desktop is inaudible.. and if you can hear the fan spinning during gaming, then perhaps you're not paying enough attention on your games.
And the X1800XT isnt that hot in the case as everything is expelled out of the system. Its a oven for sure.. but its definitely not a winter heater.
Thanks for letting us know you're not wearing us Green Blinkers, but please stop branding honest X1800XT users recommending the card as ATI fanboys..