since when does anybody use anything other than Termignoni on a Ducati?
(yes, i have Arrow on my S4RS but thats only because nobody will sell me their full 50mm termi setup lol)
Akrapovic supplies the MotoGP & WSBK teams and has for years. It's good enough for them so I went with a full Akra system on my 1200S. After 9,000 miles it's getting a bit loud though.