Beautiful Jeep...congrats! Welcome to the forum.
Personally, I like deep, but not too loud...but not "factory exhaust hushed" either.
I like the sound of the Gibson cat back exaust systems. You shouldn't have any trouble finding exhausts for these online at off-road/Jeep vendors for probably less than $600, and most just bolt right on.
Try looking for Gibson, Flowmaster, Borla, and others for the 4.0 liter 6 on Youtube? There are a number of videos there so you can hear the different exhaust notes before you buy.
In God we trust.
All others bring data.
'02 Sport, soft top, 6 cylinder
5 speed manual, 4" lift, 33.5" tires