I'd get a 9800 gt rather than a gtx simply because its single slot and there isnt much of an increase if any.
Originally Posted by pulse223
given your system with the 285, you probably wont need a physx card.
Look around the threads, some ppl have experienced actual bottlenecks with gtx260 and physx cards. So if you DO decide to get a physx, go with 8800 or higher, but def not an x600 series card