I personally don't mind my onboard, but then again I have to live with it because I dont really have a choice since there isnt anywhere i can fit a PCI sound card with 2 sli'd watercooled vid cards.... Hopefully they will wide up and release a pci-e 1x card which I will be able to use in my system shortly and bypass the onboard.
But for now, the onboard sounds fine, and I dont have any complaints with it.