until recently I'd say asus, my pc is old and still running strong on an asus platform and its at least 4 years old. but gigabyte has really stepped up thier game the last few years, i help alot of my friends build custom pcs and i've been getting them to go gigabyte lately there has been a few issues of DoA asus boards which when sent back they claim things like scratches on the board which weren't even there when we sent them it (took pictures first after one bad experience with a 12mp camera then they sent pics of a scratch on the board which was no actually on it stating it voided the warrenty... they also sent the doa board back plus the scratch)