I have also heard Corsa and a few others and IMHO Zoomers has the best muscle car sound and no drone in the cabin. I've had it for almost 2 months now and it has a nice deep, low, muscle car sound. Not obnoxiously loud. And there is no drone in the cabin. But when you really get on it, you know you got a real exhaust.
Just MHO.
Thanks ZOOMERS!!