I only have one bbl, and it came with the gun, so I dont have PERSONAL HANDS ON experience. BUT, Ive seen the use of a stainless bbl on a blued frame in the T/C catalog. It actually does not look as bad as you might think. As a matter of fact some fancy double guns use dark and stainless to create rather nice contrast. If its good enough for a $1800 O/U I think its just fine for a $500 T/C.
Brian M.