I have an old school father/son shop I go to.
They hooked me up with what would be the best in my situation.
Didn't cost a fortune either, like 125 welded.

Get as big a resonator as fits and you will be happy.
All 3800s sound like ass no matter whats on the pipe unless maybe big cam and turbo.
But hell we all know that.
Any muffler including stock sounds like crap noise just at different frequencies.