- PC used mainly for gaming
- Core i7 2600 (I got it for $179, reason why I didn't choose the K version).
- Don't need SLI/Crossfire (prefer to use 1 high-end video card and avoid dual card issues).
- Must be able to place a 2 slot video card and a sound card.
This are some of the choices I have in a store near my house (I don't live in U.S.A.) from most expensive to cheap:
I would go w/ the UD3H or the P8Z77-V LE if I was limited to your choices. Buy which ever one is cheaper.
DON'T overclock the 2600. I'm pretty sure you're going to OC it by the BLCK, which will cause a LOT of stability issues.
The 2600 is perfectly capable at stock, no need to sacrifice stability for a few extra Ghz.
They also have ASUS P8Z77-V PRO but that one is expensive.
The Extreme6 adds a firewire port and a display port from the Extreme4. I'm pretty sure it has a beefed up VRM design, too. But it won't matter since you're not overclocking.
Buy which ever one suits your needs the best, since all the options I suggested have 2 slots free from each PCI-E slot