I have had stock, RG3 and Moto Corse full Ti systems. I know I'm a terrified old guy and all that and have not approached the limits but honestly, imho, there isn't that much noticable difference in performance between the three to justify the expense. Not for an every day average street rider anyway. Donsy maybe, but not me. Save your dough for when the electronics go down the mine.
I got mine. Boy do I ever got mine.