OCWorkbench.com have previews of some of their latest board including a P55 based.
SUPoX was created by former employees when EPoX executives did some illegal scandals and got locked up.
If you're looking for drivers then as Badge said, get them from the chipset maker's website instead. I've got an EPoX 8RDA+ here which uses nForce driver from nVidia for example. For other devices like LAN and sound, get them from their respective manufacturer.