They're about the same.
I liked the Abit because its a little cheaper, and it has 6 pci slots. I'm filling five off the bat, and can think of several things I might get for the sixth slot. Asus only has 5.
Get a raid. I'm using it raid, but even if not, the extra two IDE channels are nice to have. your hard drive, burner and CD-R reader for burning really should all be masters on their own channels. That's one more than non raid boards have right there.