Wait to see what the new 8800GT delivers. It has faster clock speeds (although lacks slightly in other areas) and is cheaper than the GTS.
From current benchmarks, it actually out performs the GTS and in some extreme occasions the GTX also. Not bad for a $250 GPU.
Check out this:
GeForce 9 ::: GeForce 8800GT i 9800 Series
Why AMD over Intel? Just curious.