I already have the 4040L Aerotubine on my "05". I like the sound when I put the peddle to the metal but I'm looking to change it out when I claim tax $$$'s next year. It almost sounds like a riceburner. It does turns heads. What I'm looking for is the deep, throaty, louder Flowmaster sound. What catback system should I go with? Banks, Flo-pro, Magnaflow or should I just keep the AT and save my money? I was also thinking about going with the Banks Monster Duals. They should be out by then. Maybe even the MRBP Cool Duals. I definetly don't want to go with the Flowmasters themselves because I've heard they are not a good match on turbo powered engines. All input and idea's are welcome. Thanks.