Nice concepts!Although I appreciate the symmetry of the top two, I honestly think that the bottom center one works the best. It's clear, readable and yet has nice style to it. I think I'd work on the "r" a little bit and possibly leave the ascender on it.I took the liberty... and I have no idea why it's appearing on a blue background.
Top right or bottom right gets my vote!
Bottom right with one cavaet... DB:... making the lower part of the "B" look "bass clef" like...