MUFFLER OPINIONS

In my experience turbo mufflers kill power and have tremendous backpressure. As in a 15-25whp difference between a straight through design like a Magnaflow, Gibson (what's on my GTS) or if you are on a tight budget Flow Monster is sold by FlowMaster/Holley and the are very nice for $50/muff.
None of my other cars have tail pipes so I cannot offer much beyond that.