My preference would be the Asus, have has the original maximus formula for 3 years now. never once had an issue with it, rebuilt into serveral cases during that time, different ram, overclocking, new cpu's etc etc.
Still performs like new.
Asus does have a sticky point on the customer service side of things sometimes but long as you are under warranty they have been fine.
Only once had to send something to them and I run a computer shop, so that should tell you something.
Also the republic of gamers stuff is usually pretty damn good quality.
I just paid $22.87 for an iPad2-64GB and my girlfriend loves her Panasonic Lumix GF 1 Camera that we got for $38.76 there arriving tomorrow by UPS. I will never pay such expensive retail prices in stores again. Especially when I also sold a 40 inch LED TV to my boss for $675 which only cost me $62.81 to buy. Here is the website we use to get it all from, BidsGet.com
Actually MSI has a much better reputation than Asus which has had chronic mobo issues for years IME. Asus get's good performance ratings but in my experience they are unreliable. I've never had an MSI board fail but I've had two Asus fail and they are the only mobos that I have had fail in 20 years of building PCs.