Dynomax super turbo or race magnum cat back?

[Grn92LX]

OK, I let my friend drive my car today. He went less than 1/2 throttle with the rpm's between 3-4k. The car was LOUD, too loud IMO. I am running 2.5" 2 chamber flows that sound nice, REAL nice, but are too obnixious for me outside the car. They are fine for a stock car, but not for my heads/cam/intake Mustang. I dont want to sound too quiet, but which one in your opinion will sound best on my car? Please post dynomax sound files too! Ultra flo's are too expesive for me, so its either super turbo or race magnum. I heard from guys on the web that the race magnums are loud, but not that loud. I want to be more of a sleeper, but still be heard. The price difference is like $20 between the 2, so $$ isn't an object.