I was thinking more of a minimum not a maximum. I'm thinking I might prefer the ergonomics of one of my cordless drills that has a top end of 800RPM. If that's not enough then it's not an option. This is the drill:
41YovguHkXL.jpg

http://www.amazon.com/Makita-DA391DW.../dp/B0000226A4

Is 800RPM enough?