What Portaflex cab sounds closest to a B-15 when paired with a PF-20t? I'm going to pick up a PF-20t for the studio and just don't know what cab to go with. My goal is to get as close to a B-15 as possible however I do like the sizing of the PF-112hlf cab. I haven't seen any reviews with someone using a 5-string on 112. Does it have any issues handling a low B or is a 115 the better option?