The GTX should outperform the GX2. If it doesn't I will be FURIOUS.
I do not think it will outperform it. I think that all that has changed was the naming convention. Biggest change is the shrink from 80nm to 65nm. Same transformation GTS went.
The only thing worth waiting for is whatever gets released in mid. 2008, either way, I am happy with mah GTX.