Hi, cherry bombs are cheap enough to experiment with.
Try not to hack up the factory exhaust,see if you can install them
in such a way that you could easily go back to the stock set up if you do not like the noise.
You may need exhaust restriction cones to avoid negative side effects.
I am not sure if any are avalible for the wing but these could be made easy enough.
And yes if you decrease the back pressure with the glass packs you may negitivily effect the performance .the Wing has a cat on it so the side effects if any may be minimal.
http://www.jpcycles.com/performance?Ntt=Exhaust &Ntk=All