CD of the desired sound plus a good sound system?
Personally,I would rather be a quiet as possible. The Class C has a rather large engine (V8 engine in a G3500 Vandura Chassis... 454 engine or something like that) with dual exhausts (former owner was a race fanatic). It is a little noisy to me. It deeply impressed some nut in a FL campground. It's just too noisy.