I also have the P4P800 Deluxe. However, the P4C800, all versions, was designed to be a server board, and is probably in the long run more stable and reliable. You need to look at the ASUS web site for the differences between versions, but I thing the plain Deluxe, not the E version, is short some desirable features if you want RAID capability. That said, I have experience NO stability problems with the P4P800 Deluxe.