003, have you actually looked at the benchmarks for the X1600XT? Or are you just an ATI fanboy.
If you are a 3DMark05 freak, get the X1600XT, because thats the only thing it actually beats the 6800GT/GS in.
However, I don't think somebody who is that worried about 3DMark05 would get a midrange card like this.
Now here is Far Cry, which is an ATI biased game, and the picture isn't quite the same.
The X1600XT is a complete waste of money when compared to competitive cards, much like the X600XT was. Go for the 6800GS which performs the same as the 6800GT stock and a little better when overclocked.
And no, the GS doesn't blow away the 6800GT.
And here's a nice article about it from The Inquirer.