I know there are 1 million threads on exhaust but here is another one. I just bought an 07 Titan and the first mod I would like to get is a new exhaust. I am trying to decide whether to buy a cat-back or just replace the muffler. What I am looking for is something that sounds good and will improve performance without being too loud in the cab. I really enjoy the quietness of the cab but want to turn heads outside. I read one thread that said the best exhaust for the 07 was to just replace the muffler with a Magnaflow (14580); but, I read alot about Banks also. Any suggestions?