I understand. I have not tried the 1003 BIOS. Hypersonic PC recommended I go with the 1005A BIOS, because it specifically addresses the GeForce Ultra/AV7 mobo issue. Plus, since I knew that I was going to flash, why not flash UP?
Are you planning on picking up a GeForce DDR?
I don't think you should flash, UNLESS you are having a problem.