Had a rebuilt 5hp Quincy head sitting in my shop for 10 years before I decided to try it at home. Bought a 60 gal tank and piped the basement with copper. At 25 SCFM this baby does not care what is hooked to the other end. Still cycles with continoun work with a glass bead cabinet, and grinders/sanders can work two at a time, or more. Agree...get the largest you can find for the money you want to spend. BTW, the Quincy is all cast iron and comparatively quiet in my basement under my steps (out of the way). Chuck