I use a 18v Dewalt xrp, with the 3.0 amp hour Ni-cad batteries. Xrp drills have 3 speeds, in 1st gear it spins 400rpm which is still a bit fast. I run an 8 inch mora and it cuts good, but I have replaced the switch 3 times. The 25 amp switch can not take that kind of draw. I rigged up a more heavy duty switch for this year 1st ice. I would suggest a 6 inch auger, 8" is a little much unless you don't mind burning up drill parts. I like drilling holes with my drill auger, but am upgrading to gas this year. I think an Eskimo Mako 43cc 8". Can't beat the price