Pokey- thanks for your insight. As you mentioned, stock or Remus are likely my only options, and I can't see going back to stock. For weight reasons alone, if nothing else, I'll try Remus.
Interesting observations on the catless header / s-pipe. Needless to say I am not interested in any magnitudes louder
My worst fear would be to go to all the trouble of swapping to Remus and having no reduction of drone.