which combo to put on my 2008 Honda Rincon 680?

I run an HMF Swamp Series XL exhaust (loud) with the HMF fuel injection optimizer, gives my rincon more low end. They also have other exhausts that re quieter and will work well also. Big gun has a good exhaust and tuner, but it might also be loud. Supertrapp has a slip on, an they might use the dynatek brand tuner. Also FMF makes good exhausts. All the combos should provide a big difference over stock.