I too felt the open remus was too loud, but the standard baffles were a little quiet.
I got some large diameter baffles from a german ebay site
I believe there were two flavours of Remus. One straight one slash cut.
http://www.ebay.co.uk/itm/Buell-XB-12-9-DB-Killer-Eater-Remus-Sebring-Tuning-Silencer-ab-2008-S-SS-NEU-/252709332260?hash=item3ad6a66524:g:fDkAAOSw9GhYbSiMhttp://www.ebay.co.uk/itm/Buell-XB-12-9-DB-Killer-Eater-Remus-Sebring-Tuning-Silencer-bis-2007-S-SS-/262783109150?hash=item3d2f18081e:g:K~AAAOSw44BYbSyNI have the have the straight version pipe and it seriously cuts the noise but is not too muffled like the standard baffles......seem to have gone up in price since I bought them....bloody Brexit!