Go ahead and get the 3500, or the 754 3400 (actually a better performer) if you're not obsessed with PCIe at this point. As a side note (yes, I read the post; no flames please), the 3200 Winchester should reach 3500 speed with no voltage boost, though, and if by some chance later on you decided to play around with the chip even more, the Winchester will OC better (I've seen completely Prime stable with 2.7GHz).