Ive heard all the sounds on the mustang exhuast site but i was wondering everyone elses opinion on what kind of cat back system i should buy. Im looking for a real deep tone, i like the old muscle car sound, and im trying to get that out of my stock 98 GT. I just recently payed it off and am ready to start some mods. What type of muffler should i look into for like 500 bucks, all said and done?