My vote goes here "Asrock Fatal1ty Z68 Pro Gen3 intel Z68" from personal experience and before this board I owned an ASUS P5Q Deluxe running a Q9650, great board and not had a single problem with it and I tried SLI 580's (used my friends 580 to test with my own) on it and worked amazingly well, not a single hiccup at any stage it just works as designed and fantastic quality board.
Asrock Fatal1ty Z68 Pro Gen3 intel Z68 (Socket 1155) DDR3 Motherboard
http://www.overclockers.co.uk/showproduct.php?prodid=MB-053-AK&groupid=701&catid=5&subcat=
Check the reviews you will see what I mean, some on their site if you click on awards and move down and click the site.
http://www.asrock.com/mb/overview.asp?Model=Fatal1ty Z68 Professional Gen3
I avoided the Extreme 7 like the plague when I read it was using the Nvidia NF200 to try add more lanes and to me that was a problem that would rear its ugly head in the future and so far I am being proven right by many people having crossfire and SLI problems on that board. The Pro works as designed yes it does not have the NF200 chip on it and has reduced PCI lanes compared to the extreme 7, BUT the extreme 7 can not run 2 x PCI Express 3.0 x16 slots as the Pro can so the future states we will have PCI-E 3.0 graphics cards and this board is the right one to go for if you want to make sure future cards used in SLI or Crossfire will operate at PCI-E 3.0 speeds.
Check how quickly they fly out of stock on here all the time, I bet if you asked OCUK they will tell you they sold more of the Pros then the Extreme 7s and had not one returned for any reason. Did you not wonder why there are no threads regarding this board complaining about it anywhere ? I think that says it all, also no inverted mouse problems on this board in the BIOS/UEFI. I installed the board and updated the BIOS/UEFI to version 1.30 and installed windows and has been as good as gold.
This is my current setup here for you to look at and see how nice the board looks and how it fits into a case.
http://forums.overclockers.co.uk/showpost.php?p=20343245&postcount=5594
If the board had ASUS name on it, it would have cost atleast £300+. Great value top end Z68 board I think and totally stress free, it just works. The only reason to look at the Extreme 7 is if you want to add 3 graphics cards, no other reason. Also to add the Pro's V12 + 6 Power Phase Design is better then the Extreme 7s too. Just compare the specs on their site and you will see what I mean the Pro has more advantages then the Extreme 7 and it allows IDE drives and floppy connections if you still have an old IDE drive floating about.