I bought the Rush with 2" baffles from Fuel Moto and had them put the Silent Sport packing in them for around $40. They sound just right for my taste. If you want them louder, then just yank the baffles and remove some or all of the packing until you get 'em where you like 'em. ;-)

 

I've had Rush 2 inch on a Fat Boy as well as my 08 RK. Not to loud and they get better with age. Go for it.

 

I have the Rush with the 1.75 baffles on my '07 ultra. They have a nice rumble and I can still hear the radio while riding, which was very important to me. They do get louder with age. Mine are now about 2 years old and I think they are just right.