My teen-age son just started learning double-bass a year ago. He has played on many loaner basses, and has decided he likes the flat-back kind the best. I'm finding that for the most part, flat-backs start around $4,000, and these are generally "professional" grade basses. I'm beginnig to suspect that he likes the flat-backs because they tend to be more expensive than the standard student carved-back models. I did discover a Strunal Model 5/5WE at Shar and other places in the $2800 range. I've been told by one bass store that cheap flat-backs have bracing problems. Has anyone had any experience with the Strunal 5/5WE? Thanks.