I'm running the Rush 2:1 on my 07 SG and love it ... I got the 2.0" baffle and it's kinda quiet, but the baffles are removable/replaceable. So I may go bigger at a later date. Also Rush is GREAT to work with ......... Had Rush slip-ons before going to the 2:1.
I had a Pro Pipe and hated it. Went with the Rush Reaper and am very happy with the sound, fit and finish. The ceramic coating really helps cool things down. The 3" baffle sounded great but was too loud so am running the 2.5.
I've used rush 2 into 1 exhaust on my dyna and it was a great pipe fairly loud. With this bike I found a deal on a rush wrath bike. Great performer and sound. Only problem I have with it is the equal length rear pipe can cook a thigh on a long ride on a hot day.