I have the PX845PEV PRO and have been very happy with it. Only problems I had was onboard sound cutting out while in games, but a driver update fixed that completely. The BIOS could use a few more tweakage settings though, perhaps in a new version.
Pretty good. I'm limited by my temporary crap heatsink. Uses a Pheonix bios, but it has most stuff you'd want. PCI/AGP lockable, you just type in whatever FSB you want, auto or manual divisors & voltage settings.
I have a 1.6A P4 & 512MB of Corsair XMS 3500C2 RAM
I can do 2.13Ghz CPU and 354Mhz or so on the RAM easily.
I've only had it for about 3 weeks, and haven't finished my watercooling setup yet, so I haven't really got to tweak it much, but so far it's been stable as hell.