The Z77 Extreme4 is $50 more!
Also, are the B75, H77, and B65 overclockable? Are they worth it?
Thanks for posting this, by the way. But man... that's a pretty hefty price for just PCI 3.0
EDIT: Also, interestingly enough, there are WAY more USB 3.0 ports on these.
EDIT2: Last thing. All of the useful combo deals are for the Extreme4 and an SSD. Just throwing that out there.