A buddy of mine just bought a 09 streetglide, damn thing sounded like a boat motor. I think the pipes he put on were rhinehaurs, still don't sound like a harley. Maybe he'll get new pipes now, hit a car and flipped it 3 or 4 times. $9000. damage 2 broke ribs broke thumb. Oh and welcome,ride safe
IMHO any True Dual will sound better and give you more power if you get the proper tuning done after the install.
Go to a bike night and listen to other bikes to find out more about what sound you are looking for.
I have a 08 Streetglide. Got tired of the stock exhaust, but thought I had to go with a true-dual set up to make it really sound good. Got some advice from two different sources and went with Rinehart Slip-Ons. I think they sound bada$$! I am getting some slight popping at deceleration. I live in Texas so it will soon warm up and I am told it will get worse then. Looks like I am going to add a Stage 1 air-cleaner and remap the system.