I personally have been to ASUS's headquarters in Taiwan (my native country) and first hand have seen their customer support teams and PR teams.. While that may be directed to Asian audiences I do not doubt their build quality and customer service... I had serious doubts buying the Z77 Sabertooth when I read all the Newegg reviews stating "Bad capacitors, bent CPU pins, won't boot, and etc" However I bought the board anyways as my first Intel board and it has worked just fine throughout 3 CPUs, many different heatsinks, and tons of cases.. And when my friend went and had to have his 990FXA board returned he went straight to ASUS and basically what happened was he said it was broken, they asked vaguely what happened, and he returned it. They sent him a new one literally a week afterwards and didn't question whether or not the damage was user error.
TL;DR ASUS has stellar products and customer service.