Physx Accelrator card needed with 8800gtx?

[thatholydiver]

I'm getting the geforce 8800gtx and will a physics card boost any performance at all? I don't expect any fps gains but supposedly the physics card offsets the load off of the processor and gpu, so all around it will run faster and smoother?

And which PPU is the one to get, the Asus or the BFG, both 128-mb or is there a better one?

BTW, I'll be running a 6800 conroe dual-core with 4 gb corsair dominators.