I ran the V&H Dresser Duals with the 3.5 Khromewerks mufflers on my 08. It was perfect! Then a baffle went bad and I did several mods chasing more low end torque and changed the exhaust......sometimes think I should have just changed out the baffle and left well enough alone.
Too slow on the edit to add.
Fuel Moto is now offering a new "E" series dual system for baggers based on the long gone White Brothers E-Pipe. A tunable system, stainless and early reports are good; check it out if looking for a top shelf TD system.
Fuel Moto E-Series Exhaust