Some tech set my Fernandez up with an .080" once. It sounded like a chunk of rebar tuned to B. I even tried it tuned to A and finally tuned to G, but it just sounded like crap to me.
I'll probably stick to strings in the .058" - .060" range for my low B. It's not to light to tune to B at 28".
I never tried scotums for strings before, but from what I've heard, they sound pretty kick-ass tuned to B. Can't wait for the clips.