A member on here named Kentaro has the JoeZ exhaust.
I'm not sure if he still has it though.
I met up with him a year or so ago and we both showed off our exhausts, though mine ended up being a little louder, which I didn't want lol
The JoeZ does sound very nice though, you should definitely just pull the trigger.
I don't know much about how it drones in the cabin, but I have the F Sport with the Invidia, and it doesn't drone in my car.