Originally Posted by Tr1cK
Capt, those reviews are from when the 4800s launched. The drivers are MUCH better now and performance has gone up. I know since I've had one since launch.
Here is a recent review comparing the 4850 to the GTS 250:
They seem to be almost identical in most cases with the GTS 250 coming out on top most of the time.
Add in Physx and CUDA support and I think the GTS 250 is the better buy for a good solid mid-range graphics card.
EDIT: Another review with similar results: