I love my Top Hat SD but I am beginning to think that I really really need a bit more headroom. The SD has almost exactly the tone I am searching for, but after A/B-ing it with a 57 Twin that my buddy is trying out, I find that there are some songs that I really need a louder clean tone on. My Pitbull 45 was just about perfect as far as clean headroom, but I like the tone of the SD so much more for my playing. I've tried both inputs, Ax7, AT7, AY7. I haven't tried swapping speakers yet. It has a Celset Vintage 30 and a stock Top Hat speaker. Anyone who has played both, could you comment on the comparing clean tone/headroom between the Top Hat SD and the following- ( I know some are switchers) TH Ambassador 50 TH Emplexador 50 Aiken Sabre Fargen Bordeaux 6L6 Fuchs ODS 50 Bruno Cowtipper 45 Sewell Wampus Cat 50 (maybe a 35) Flexi 50 Any other ideas will be appreciated.