Droning isn't really a HUGE problem with any of the exhausts you guys named. That's just understandable excess noise you get when you strip all the resonators off a stock exhaust and take off the very restrictive muffler. I know that's all obvious, but ride around with a straight pipe and no resonators in a vortex GTI VR6 all year and you'll see what droning really is. It drones at idle for god's sake....