Good to hear the new TT motors sound good! Can't wait to see what exhaust setups we will see. My 55 is in the high 5's to the crank, torque in the upper 6 range. One of the reasons I love the AMG power is the amount of torque it has - it's kept me away from owning an M BMW for years now .^Completely agree with you there, had a great sound but not impressive. Was really jerky when I drove it which reminded me of my '08 M5 which I hated. Terrible for driving in the city, great at high speeds. But fortunately they have retained that sound with the TT.
What is your 55 putting out? I've seen the pics btw and it is drop dead gorgeous!