I don't normally put pipes on bikes other than Harleys as I don't normally think they sound all that great. Also, I'm not into loud pipes. Even on my Harleys I keep the pipes thing pretty tame. In fact, I had a guy follow me into a parking lot when I had my Street Bob to ask what pipes I had because he wanted to put them on his bike. He said he liked them because they had a nice throaty rumble, but they weren't offensive sitting next to them at the light.
Anyway, I decided to put some British Customs "Hog Slayers" on my T-Bird. I only have sound clips to go off of, but from that and from talking with others, it sounds like they'll be like the ones I had on my Street Bob; nice rumble, but not offensive and actually tame at idle. These pipes are around 20lbs lighter than the stock pipes, which frankly I don't care about one way or the other. The good news to me is they don't require a special tune. They use the same Triumph tune that the TORs use.
I actually liked the sound of the Faron Razorbacks and Stainintunes better, but I'm not paying $1500 for pipes (Razorbacks) and I don't like the looks of the Stainintunes much. The Hog Slayers are listed at $650, but I got a discounted price. They should arrive in a couple of weeks.