I've got an 08 Silverado and I think I've finally came to a decision on which exhaust setup to get. I'm stuck between the cheaper dynomax with ultra flo muffler (Partt. #39468) or a magnaflow with 18" muffler (Part. #16741). I want it to have a nice sound when I get on the gas but I don't want a whole street of people looking at me as I go down the street. Suggestions on either?