If anything use a turbo style made for reduced backpressure. It's old news, but Hot Rod tested them all back in the 80's, and all the turbo styles were far better at noise reduction without major horsepower loss than most of the rest - especially those spiral cut fiberglass packed tubes called mufflers. They are really horsepower traps, not noise traps.
Some still use them, saw one on the side of the road just the other day. They are generally crap, have better paint jobs on them than steel in them.
I would also look into a large diameter small format performance cat - no muffler can do much with some of the power trapping stock designs out there from pre-'96. And a properly designed cat back system can give more bang for the buck than most of the loud cans I hear in my neighborhood.
Just promise, whatever you get, don't start the Jeep and race it up and down the tach for 5 minutes before you pull away from the house. I've got one of those across the lane, now, and you have to wonder what he did to screw it up so much it won't idle. Criminy, we've got computerized fuel injection, sensors, and no choke these days . . .