I personally like ASrock (I am, of course, a bit biased as I have an ASrock z77 Extreme4 myself and it's just fantastic) so I recommend it.
If your looking to save some money though, you could get the Extreme4 instead of the Extreme6 as there's no big difference. But both will be perfectly fine, and the Extreme6 looks even sexier than the Extreme4.
The Extreme4 is a bit smaller than a regular ATX though. I guess there's 1 vote for the extreme6.
That's what I was going for too, but I just wanted to get some opinions from others.