The ABit BP6 bought me so much "cred" at LAN Parties back in the day - the only dual socket motherboard in the building, and paired with two Creative Voodoo 2 GPUs in SLI mode, that thing was a beast (for the late nineties).
I seem to recall that only Quake 2 or 3 was capable of actually using that second processor during a game, but that wasn't the point ;)
My latest ASUS was good enough, but I didn't (and probably won't) build any newer systems, so ABITs will have the crown.