Just want to second/third the opinion of the NVIDIA 8800 GT.

IMO for the price there is simply no better card on the market.

Performance is just slightly less than the GTX cards for 1/2 the price.

It is not the fastest card, but it is the best price/performance out hands down.

One quick way to make sure you are looking at the right card is that it comes with 512meg of ram as opposed to 320 or 640 on the GTS/GTX cards.

The 8800GT outperforms the GTS, & is cheaper by half than the GTX for just slightly less performance.