I have the P4PE. Only about 3 weeks now but it's a great mobo so far. Have P4 2.4 133 overclocked to 2.7, at default voltage. Stable and trouble free. No problems with ATI.
There was one problem however. One of the plastic pins holding the cpu cage to the mobo was not properly seated (thats the way it came in the box) so when I put the heat sink on the cpu one corner of it was not touching the cpu. Even so, the system booted up and ran fine -- but at 65 degrees C !!!.
That was an easy thing for an experienced pc builder to fix, but could have driven a newbie nuts.
None the less, I highly recommend this mobo to this point. Nice features, good utilities. Came with all required hardware, including sata cables. It seems to be one of the last mobos having 6 pci slots (5 useable).
Even upgraded the bios from within Windows -- a great feature.