IF i know that bikes pipe, its in very good nick and not dented out, infact perfect body.
There is NO logical reason other than you like to waste money to change that pipe out, infact i believe you would not gain any disconcernable output from any other aftermarket pipe that could just ify the expense.
I previously ran that bike with 3 differant pipes including a circle f and every time that pipe came out hands down best riddability and traction.
That pipe in that condition is worth much more than any other pipe your thinking of replacing it with, besides the fact that also fit properly and also dont crack at the support welds that most A/M pipe hung on TM do.
Me thinks your crazy... this is a rookie mistake.