I haven't had either of those boards, so have no opinion on them. I imagine that the Sabertooth may have similar issues to the ROG boards, since it seems most ASUS boards share main BIOS code. Extreme6 should be good...I have the Z77 Extreme11 sitting here waiting for me to review, that's an interesting one, but I think that might be outside the form factor you need.
Gigabyte, you could go for the UD3 or UD5H, both are pretty good, and the UD3 is a sleeper OC board.
MSI Z77 MPower is very good too, although I have heard some users with MSI usual problem of BIOS limiting OC in some instances.
Personally, I really like the Gigabyte Z77X-UP5 TH. It's not a top performer, but having dual Thunderbolt ports is a nice thing, to me. Not everyone is interested in Thunderbolt yet though.
Biostar TZ77XE4 is great too, Crazyeyesreaper has one and cannot say enough good things about it. It won't clock memory as well as the bigger brands though, of course.
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