I've had an o/r x and flowmaster hushpower for years. Not a fan of the flowmasters. I just ordered a roush AB the other day. I'm sure I'll be much happier.
Roush exhausts for me. here are a couple of vids I made of my cammed and supercharged 4.6
[video=youtube;9LBypacV_4g]https://www.youtube.com/watch?v=9LBypacV_4g[/video][video=youtube;pLf48hka1t0]https://www.youtube.com/watch?v=pLf48hka1t0[/video]
I got boss side exhaust and roush. Love the sound. Had gt500 mufflers first and that sounded better but just wasn't loud enough for me. Roush has nice rumble.
I love my Roush A/B's with stock piping and cats. however I know it will sound like shit when I got LT's w o/r x. The best sounding car I have heard with LT's and the o/r x are with Kooks axel backs and the route I am going next.
My vote is off road h pipe stock resonators and Borla S axle back sounds nasty. Second stock resonators off road h pipe and quad gt500. I wonder how the loudness and drone compare though.