I had an original of the P6T Deluxe and absolutely hated it. Not sure what was the cause, but was very very unstable, and when I got my P6T6 WS Revolution, I had no problems. Currently I am using the P6T6 and a DFI x58 UT-T3eH8, the DFI is much better than the P6T6. So of the 2 you mentioned I would suggest the Gigabyte EX-UD5, or possibly look at one of the DFI boards.