I've never seen anyone run those Kuryakyn mufflers (or even run their complete system for that matter). But with Bike Week and Deland Bike Rally starting in 10 days (Yay!), I'll keep an eye out for them. I do know the Kuryakyn 18 wheeler wil be at Destination Daytona, so they may have a set up there.
I've heard of folks running Fuel Moto's power package and they like it.