Breakdown:
-If you're overclocking get the DFI
-If you want the features get the MSI
-If you want stability, and a bit of overclocking get the A8N-E. But it has no firewire
-If you need firewire, and won't be doing that much overclocking get the Gigabyte.
Not sure what you want, but I recommend the A8N-E in this case, and get an Audigy2 (which comes with firewire).