muffler suggestion?

i will eventually have a 360/904 combo in my 70 dart. not sure yet if i will have manifolds but im aiming for 280hp and 20mpg so who knows. anyway i was looking for a decent turbo muffler suggestion (brand or specific part) and what size pipe i should go with. i dont necesarrily want it super loud, i want it to be heard and have a healthy rumble and just sound muscular

ive heard good of cherry bomb, flowmaster, and magnaflow but i have no idea what would be best for me