I've tried a couple of exhausts, a Nismo system, a HKS Dunk Megaphone (yes the name says it all - very big and very loud) and now I have a Fujitsubo Legalis Super Ti and I can't speak highly enough of it. VERY quiet and no power loss plus it looks great. People actualy ask me if my cars running! Best thing is that it also passes EPA even with a Batmbl 3" dump/front pipe and a "special" 3" cat
Do some reading about Fujitsubo and I'm sure you'll agree, just stay away from the Powergetter - very loud.