Blue Cypher said:
So the x1900 is better? its going to be used for all the latest games by the way. I mean the 7900 is newer so does it not have newer features?
Unfortunately "newer" does not always mean better, comparing a Geforce Ti 4600 vs. a Geforce FX 5600 is a fantastic example of this.
The X1900 series generally outperforms the 7900 series in all but a few games (mostly OpenGL ones if I recall correctly) and has better features such as AVIVO and the ability to render HDR and antialiasing at the same time.
As others have mentioned, the X1900 series is hotter and louder than the 7900 series, but without bias it is my opinion that this is the only saving grace for the 7900 series at the moment. Besides, it's very cheap and easy to fit a Zalman VF900-Cu to the X1900 and drop temperatures like a stone while making it compleretly silent to boot. I just installed one of them on my X1800XT and I have come to the conclusion that anyone who doesn't buy one of these coolers is utterly mad, wether they are using ATi or Nvidia.
Last but not least is the question of your particular motherboard and also of SLi. If you plan to go dual-card sometime in the future, and under no circumstances intend to replace your current motherboard, then I strongly suggest you go for the 7900GTX instead of the X1900XT or X1900XT-X. This is the only reason to consider your motherboard though, because both ATi and Nvidia cards perform exactly the same in any PCI-E 16x slot. nForce boards are not Nvidia biased except for SLi, and Crossfire boards are not ATi biased except for Crossfire.