--nvidia Or Ati--

[canttouchthis]

IMHO doesn't matter much. It's more of the market at the time. Right now I believe that nVidia has the best performer, but it doesn't matter if the majority of consumers don't/can't buy it. It all matters of what is best at your price range, and that's constantly changing.
Overall, they're both about as reliable.

On the subject of Dual video cards I've found over the years that SLI tends to scale a little better than Crossfire, although I haven't owned a crossfire setup (I've done plenty of research though).
Oh and mr.Me II you are correct about image quality. Before the 8xxx series ATI was usually given the award for better image quality, however in recent generations of graphics cards there's not a big difference in quality.

[Rickto]

well i dont know much i have a 9600 gt which is ok so from the reviews ive read the newer nvidias > ati atm

[nasty]

ATI prodecesa lot more heat.

[bishop]

it depends on what your doing. ati is more for video and high definition. Nvidia is definately gearded more towards gamers.