I also have a TT mk.7 . It had a quite high tone to its raspy roar when first fitted, but after my re-map it has a more throaty sound, with a great burble and just a tiny bit of popping added. It does sound better after the re-map, but at £300 its an affordable bit of kit.
On the downside, they do have areas that corrode a bit, I am thinking the stainless steel has more of a iron content in it.
It fitted well and looks great on the car.
I think the top exhaust is the Daytona, but they don't come cheap. They look really nice with the quad tailpipes fitted.
I did look into getting one made. Plenty of custom exhaust builders about, they could knock you something up thats a bit special. I am thinking of the exhaust that Diesel Destroyer had made, well documented on the forum, which had three tailpipes and came out of the center of the rear bumper. Two of the outlets were for normal silenced exhaust, and the big center pipe was operated by a valve to give an un-silenced roar when so wished.
Scorpions are another type that owners fit, but I think they can be quite loud. Why not go to a meet sometime and see what people have on their car and listen to what they sound like. Most enthusiasts now have stainless exhausts fitted by now.
Sundance