I like the ASUS boards when they work fine, but if you're left waiting for a BIOS update, its just lucky guesses as to when they actually fix stuff.
Its the superb Abit UK support which swings it for me. A UK phone number, talking to a UK bloke who knows his stuff, with a UK RMA service if needed? Yes please
Oh that and the fact that if you have a BIOS issue, they will try to reproduce it, then talk to Taiwan directly to sort a fix out. Top stuff