Welll here is the situation I will be getting an Intel I7 920 an X58 3 PCIE motherboard not sure which one yet an Antec True Power Quattro 1200 watt and OCZ DDR3 6 GB not sure of speed yet depends on the motherboard. Here is the thing at first I was just gonna keep the two 4850's in crossfire and buy an Nvidia card pretty much for physx. But i might actually have around 450 to spend and well i might as well upgrade would it be better to just sell the 4850's and buy a GTX 470 or 480 I don't want to get the card and realize my 4850's in crossfire would have been faster. I am trying to stay under $1,200 $1,300 at the very most. The I7 920 is a must have and a 3 slot X58 motherboard. Beyond that I am open to any to achieve the best bang for my buck.