Hi ggface014....... I haven't swapped a mobo in years so I could be wrong, but I think a mobo swap does not require a re-install of Win7. I would do the swap and then boot and wait for windows to tell you what's what. You might have to boot with the Win 7 disc in HDD and hit Repair option. It also might ask for the Product Key to re-license with such a hardware change. It also might take a few minutes while it hunts for new drivers.
A good mobo is the Z77 Deluxe and Z77 Sabertooth, both allowing decent oc'ing. Plus your gtx690 will run at x8x8 lanes I believe at pcie 2.0. which is good. To run at true 3.0 then all three , the graphic card, mobo and the cpu, have to be 3.0 compliant. The 2600 I don't believe is. To run at x16x16 then you'd have to spend more for a Z77 WS or FTW mobo that has the seperate PLX chip that ups the total lanes, but there is only a small if any difference in performance.
The Z77 mobo's are 1155 socket just like your i7-2600 so no problem there.
Hope I'm right and good luck.

Edited by bprat22 - 29 Jul 2012 at 11:08am