I'm also making a switch. SpinTech makes a 16" [body] offset inlet, dual outlet muffler. I ordered it in the quietest version. (Sportsman XLP)

My shop is going to add resonators before the stainless/chrome tips. They'll point straight rearward vs. being angled down like factory.

Hopefully, I won't regret the change in sound! Hoping for a big of responsiveness out of the deal. Maybe another mpg too.