After reading all the posts, I have decided on an experiment.
My intention is to upgrade to a new system by November.. I7 930, new board, memory etc.
I currently am running an Intel Q6600, 2.4 GHz, with 8 gig of ram, and a GEForce 8800GTS.
My thought was to buy the video card first, GTX480, and try it on my old system (above) to see how much difference it would make in performance of CS5, including trying the crack.
My concern is the PCIE connector on my board vs the PCIE 2 the 280 calls for. All my reading tells me the PCIE 2 is backwards compatible to PCIE.
Let me know if I am making a huge mistake.
Branched and moved.