Congrats on the Slim. I love mine. The only thing I recommend is Vance and Hines slash cut slip ons. They look like the stock mufflers, but sound way better.
Congratulations on your new Slim. I couldn't agree more with STS's comment above; my FLSS used to sound like an electric car with stock pipes and what a difference those V&H slip-ons have made. Now my bad boy sounds like a Harley - not too loud but a deep rumble.