I own the Abit IP35 Pro with a Corsair 620HX and have absolutely NO PROBLEMS. I did research for over 2 months and this is the best P35 board out there. Just make sure to update BIOS first thing.
I have the DS4. Rock solid running my E6550 at 3.33Ghz(476x7). And the GeminII heatsink I have keeps the board with its heatpipes nice and cool. I was able to get the FSB up to 517Mhz, 12hrs Prime95 stable, but I backed it off to an even 3.33Ghz for everyday use. I chose this board mainly for the 8 Sata ports, no serial or parallel on back panel, and I got it at 10 more than the DS3R was going for at the time.