Two brands stand out for quality, They are Asus and Gigabyte. I don't even bother with other brands anymore, and I can safely say that I've avoided lots of headaches by doing so.
Gigabyte stands out a little over Asus when it comes to durability. Their motherboards are heftier and more solidly built.
As to reviews, you have to take each review with a grain of sand and ask yourself if the person really seems to know what they're talking about.
As for AM3+ boards, there are two mid-range boards from Gigabyte that seems to be the best overall package going these days:
If you're not CrossFiring, GIGABYTE GA-970A-UD3http://www.newegg.com/Product/Product.aspx?Item=N82E16813128519
If you are CrossFiring, GIGABYTE GA-990XA-UD3http://www.newegg.com/Product/Product.aspx?Item=N82E16813128510