Has anyone tried the S&S Power-Tour Mufflers?

Thinking of changing from the S&S Stainless Oval SPO's that are currently fitted to the Roadking.

Just wondering on the noise and power/performance compared to the above.

 I run the SPO on my 07 Street Glide & I think they are great also have a great note to them as well. As quack said the SPO was the top of the line not sure now.

I also have the SPO's on my bike. Great sound around the street and I don't get hassled by the cops. Give it a bit and they also sound great. Not sure of the advantange of changing