All this hubbub about exhaust sounds, I don't even know what brand mufflers I have on my stang, they sound pretty good, no drone, not loud, being a gt it has the slight down turn at the bumper, so it may sound a little different with the straight lx tail pipes. And you'll get a different note between cats and no cats, x verses h pipe and then there is a mac 'flow chamber', which looks kinda like a box, then you have the famous 'dumps', I personally hate dumped exhaust. Headers will also change the exhaust 'tone' shorties verses long tubes.
I drove a camaro once that had a small block, long tubes, 3" pipes straight back to 2 chamber flowmasters then 2 1/2" tailpipes that exited the stock location, it sounded angry at an idle and loud at wot. Cruzing you could talk without yelling. Its your call, don't over think it.