I highly advise against using the sidefans in a pull configuration. I modded my thermaltake soprano 92mm side fan into a 120mm fan
. It works great, but i had my thermalright si-120 pulling air up directly to the 120mm side fan blowing out the case. all the fans in my case are thermaltake thunderblade 120mm fans that push 78cfm at 21db. they are very quiet, although for you silent users, you can hear the air moving. anyway, i had my fans pull out the back and the side. well, my motherboard, ram, cpu etc... was running quiet cool. One problem, the PSU. I choked it of air! i was sitting there one day and it actually shut off. I touch the back of the psu and it was hot to the touch. Its best to have your fans set like this:
Front: Pushing air into the case, recommend a high cfm fan (60+ cfm).
Rear: Pulling air out of the case, high flow fan (60+ cfm).
Side: Pushing air into the case, medium to high flow fan (40+ cfm)
Top: Pulling air out of the case, low to medium flow fan (30-50 cfm)
These are just my recommendations. I may be right I may be wrong, but it's what has worked great for me. These are based on 120mm fans. For 80mm Fans i would drop the cfm down by say 20-25cfm for noise sake.
Merry Christmas