I chose the AI7 over the IC7 because the AI7 was cheaper, plus it was getting great reviews. And I also heard that some older IC7's were having voltage problems with the memory. Also, to help my case, i didnt need gigabit lan, and the AI7 came packed with cool features!! I know it was a springdale chipset, but for me, it wasnt an issue because the ~5% performance increase that the Canterwood would have given, wouldnt have made that big of a difference, for my uses atleast.
If you are looking to push a board as far as possible, i would suggest u get a newer IC7-MAX3. its voltage problem has been resolved and plus it is a great board.
I do not think that there will be a problem with your corsair pc3500 in the AI7. Some people have been having a bit of trouble with mushkin LvL II ram because they needed more voltage to run at stock speeds, but i havent heard of this happening with corsair, but i could be wrong. To fix this, you could just stick in some generic ram and get into bios and change the voltage setting, and i believe that also, a bios update would fix this as well. Many people are discussing this issue in the memory section as we speak!.
Raven