Have you already added the high flow air cleaner? If not, the cam swap is not going to do any good.
The stock pipes are restrictive, and will rob power. Look at something like the Vance and Hines Monster Ovals or Monster Rounds, good air flow and not loud even with performance cams in a TC-96. Mufflers can be designed to give whatever sound and flow you want, though some combinations will take a sizeable muffler to achieve (hence the size of the Monster Ovals). My father spent years working at a firm that designed mufflers, he explained in fuller detail than I wanted to hear when I was a kid how it was done. We are now where the motorcycle muffler manufacturers will have to offer performance pipes with lower decibel output, just to survive (if any place is left without a "only stock pipes" law on the books a few years from now...).