1) im alright with the cooler, know its heavy and all but i still prefer it over most others :3
2) Already ahead of ya, notice the MB has 3x PCI express slots, buying 2 6950's greatly outperform 1x580, and 3 6950's are pretty much on par with 2x580's at a lower price
3) the 120hz is mostly just for CSS and wow.
4) how does it perform better? 415/95 on the crucial vs the 555/495 on the corsair? personally i'd love to pay for the difference