I own a very nice deluxe 55-01 fretless, but I would choose a Cirrus over the 55-01. In fact, recently, I've been thinking about making a trade for a Cirrus. The Cirrus is WAY more comfortable. Sure they are both well constructed and sound great, but the body design of the Cirrus just "feels" right, to me anyway. I generally prefer thinner basses anyway, so this is just my personal preference...YMMV