I had a DS3 (C2) and it was a PITA when paired with my OCZ Micron D9. The best I've hit was 460FSB with 5 hours Orthos stable.

As for the P5B-E Plus, its a full sized ATX mobo and it looks a lot better than the DS3. As for OC ability, I've been testing it around a few days and got as high as 485FSB. I'm still trying to figure out how those dudes at XS hit 580FSB with the P5B-E Plus.