New mufflers, not too loud wanted

I have DynoMax Ultra-Flows on my Duster with a 2.5" system and headers, they're pretty darn loud. The turbo's would probably be a better bet for what you want.

I had Summit Turbo's on the car before that, they sounded good and definitely weren't as loud, but the crimped seams on the ends of the mufflers failed in short order causing exhaust leaks, I don't think it was more than a few months. Granted, I have a 10:1 340 with ported heads and headers so there's quite a bit of exhaust pressure even at the rear tips, but it was a pretty quick failure.