If you go with the 3HP Grizzly, you could, at a later time, build the Bill Pentz cyclone and power it with the Griz. It's not that hard. I built his cyclone and blower with an Oneida impeller and a 3HP TEFC motor. 6" PVC all through the shop, micro switches on each blast gate and a clean basement shop. I also built segmented sweep elbows. IDK what the CFM is, but this thing SUCKS!