I have an ASRock Extreme 4 and I have no problem with its quality(my first PC build, treated pretty rough b/c my inexperience, no hiccups and runs like a champ).
For your case Extreme 6 was chosen over V-Pro as in a Tom's review but I recommend V over Extreme 6 because of the ASUS Fan Control firmware is better(with ASRock you can only set a normal speed & a target temperature where you fan go 100%).
I was advised on a different thread that I might be going 'overkill' with the motherboard (since I don't plan on having dual-video card) and that there are cheaper options. Thus far, the motherboards discussed have been ASUS P8Z77-V, ASRock Z77 Extreme 6, ASRock Z77 Extreme 4, ASRock Z77 Extreme 3, ASRock Z75..
Now, I'm not sure what the glaring differences among the motherboards listed are.. I do know that the ASUS and the ASRock Extreme 6 seem to be significantly more expensive than the latter few.. Particularly for my computer usage (i.e. Gaming [WoW, D3, SC2, DotA2, Indie Games] and Web Surfing), would I really benefit all that much from getting the most expensive ones listed?