I'm thinking about upgrading by Ned Steinberger Designs CR4M 4-string EUB to a 5-string model. Unfortunately, I don't have a place to check a CR5M out here in the San Francisco Bay Area. If anyone has one, can you comment on the "B" string sound and the feel of the neck? I'm a little concerned that I won't like the sound of the low "B" or that the neck may be a little to wide for me. Plus, what kind of strings do you use for the 5-string? I'm currently using Thomastik Spirocores which sound great.