I run the Fuel Exhaust. I found it sounded the best to me and it was priced right, well almost right, it wasn't free.
Here's a couple clips of the exhaust, videos take with an iPhone so they aren't that great.
I can't remember the exact price but it was less than the Leo and it was an easy purchase. I think I paid around $250 for it At the time I was buying you couldn't get a Leo shipped to the US without having to search for someone willing to go the extra mile to ship it. None of the aftermarket dealers that sold and shipped to the US were shipping them.
I just put an Akrapovic on my 2013 800XC. I knew I wanted the baffles out before I even started installation, so managed to break free the tack welded 4mm bolts through the holes in the back of the muffler (plugged with rubber grommets). I figured it would be easier to yank the baffles out after everything was bolted on, but can't manage to get them out. Anybody out there been down this road?