I don't know about ASRock mobo, they seem to be more of a hit or miss proposition, when it comes to reliability ASUS and Gigabyte are the top 2, and let's not forget MSI either. If high value per cost is your motto I would consider MSI before I would touch ASRock.
From what I've been told ASRock should do some awesome mobos as thats kind a all they are doing. I've been told that MSI tends to lack on quality on their mobos. I'm so confused as to what to buy on this matter... My first idea was the get the Sabertooth since I'm getting asus 660s anyway, just to make it look all neat.