I'm thinking about getting an aftermarket exhaust for the GPZ and would love to hear any input from the gang!

I would prefer to keep it a dual (one can per side) setup, but I have only seen 4 to 1 systems. I'm fine with the single can if that's all that there is though.

I am hoping to get a throatier sound with a tad more volume but not obnoxiously loud. Any performance increase is great, but not quite necessary and not as important.

I've seen a great deal on a Vance and Hines ($350-or so) but hear great things about the muzzys (600-900 depending on material).

Thoughts?