Best quiet exhaust?

Hey guys I just picked up an outlander 800. It has a build date of 9/06 not sure if that’s still considered a 2006 or if it’s a 2007. It has 27" tires on it so I’ll be looking at messing with probably the secondary clutch springs and probably the one way bearing so it shifts better.
Sorry if it’s been beaten to death but I’m looking at getting the most power out of the quietest slip on I can find. I was doing research and it seemed like the hmf swamp and their programmer were pretty good. Looked like the swamp xl was loud but didn’t know how it would do if I had the xl with a quiet core installed . Would you guys recommend either of these or the muzzy with their digitune for the most useable power? Deeper is ok but I don’t want something obnoxious. Thanks in advance gentlemen.