Just ordered an '07 ST (Alloy Limited, 4x4, V8, charcoal leather). One of the first mods I would like to do is the exhaust. Any recommendations? Just want it to have a nice V8 rumble, nothing too obnoxious. Magnaflow has one "coming soon" and they do have a video/audio clips of it. Sounds pretty good. Would like a bit deeper tone though. (If that's possible with the 4.6). Any others?