I have owned asus boards for a number of years, and only had one problem so far. The chipset fan on my A8N-SLI deluxe went bad. Asus immediately shipped me a new one. Found them extremely easy to work with.
Seems that most of the problems people have with "asus" boards is simply that they buy cheap PSUs and then blame it on other parts when things go wacky. Of course there are exeptions. Every company screws up once and a while, but for now I plan on sticking with Asus. If they start screwing up, I'll drop them of course, but for now I am happy.