Get a x38 board if you want good overclocking. 750i's fsb performance is underwhelming. 2 3870 is faster than 1 9800gtx, but neither of them are good value. You might as well get one 8800gt or g92 8800gts, which perform almost as good as 9800, and wait to crossfire the new ati 4000s cards on x38 when they come out. Or spend the extra on better cpu.