For anyone interested, I decided to keep the Asus (because of the $25 savings). I ran a series of tests on both boards, and they performed nearly identical. I'll list my findings below.
I used Corsair PC4000 for both boards (cas 3 I believe) with memory acceleration turned on for the p4p800-e. I used 2 sata WD800JD's in raid 0 for the file system benchmark. The raid was created on each motherboards 3rd party raid controller (promise for asus and silicon image (name?) for abit.
Sandra Scores:
Cpu Arithmetic - IC7-G winner
IC7-G = 8789 & 3472/6263
P4P800-E = 8727 & 3450/6226
Cpu Multimedia = P4P800-E winner
IC7-G = 21264 & 28256
P4P800-E = 21284 & 28318
Memory = P4P800-E winner
IC7-G = 4649 & 4713
P4P800-E = 4773 & 4708
File system = IC7-G winner
IC7-G = 75MB/S
P4P800-E = 71MB/S
Though the Abit controller does seem faster, I have read more problem stories about this controller as well.
3D Mark 2001 SE - P4P800-E winner
IC7-G = 11096
P4P800-E = 11127
I am definitely not a gamer, but wanted to see who came out on top in this test. I was using a 64MB Radeon 8500 for 3dmark.
Overclocking - IC7-G winner (no definitive numbers)
The abit board was definitely easier to overclock. I think both boards could run the cpu at the same speeds, but the asus seemed much more taxing on the memory (even with memory acceleration turned off). With the abit I was able to hit a fsb of 237 at 1.4125v, the asus made it to 233 at the same cpu voltage. Max load temp on the IC7-G was 65C (scary to see), while only 50C on the asus using a cheap coolermaster heatsink. The abit board does seem to overvolt the entire system compared to the asus (possibly why there is more stability at higher speeds).
Conclusion:
The PC4000 memory was borrowed, and my PC3200 can't even go above 215fsb (210 on the asus). For the price difference, I felt the Asus was the better buy. If I was only interested in overclocking, I felt the abit was the better motherboard. It consistently was able to reach higher speeds with the abit. Because of my memory limitation, I decided to save the money and go with the Asus. Both systems "felt" just as snappy, and the benchmarks were very similiar.