wow, dazila, that's a name I've not heard in a while! Why are you going for the X6 1090T? Do you use programs that can actually benefit from 6 cores? (Games do not) I'd recommend changing the Asus board and Kingston memory to a Gigabyte board and Corsair memory, Asus boards tend to be pretty naff lately in terms of build quality. The Noctua D14 (if that's the heatsink you have) is tremendously powerful, you don't need to upgrade to the H70 to properly cool any modern processor, even including the Phenom II X6 and the Core i7 900 series. While I would recommend changing the PSU for this upgrade, the 750W PSU is overkill, a 650 would be fine.