klonger, you didn't mention your goals. Is it mainly the sound or are you after more power?
If sound is what you're mainly after, save your money and just get a Delkevic. I've had their exhausts on 3 bikes. They sound very good. I have the top of the line carbon version on my 14 1k and it was still only $299. Keep in mind that it will likely need repacking at 6-10k miles, depending on your riding stile and baffle use (longer service interval without baffle).
I run mine without baffle and it's no louder than stock. Deeper note and at low RPM, perhaps a bit Harley-esque, but this is a V-Twin.. that's what you're gonna get.
2bros is one of the louder options and they recommend repacking every 6k miles (though most don't do it nearly that often and have no issues), so you may wanna skip that one. Scorpion provides lifetime warranty to original purchaser and is guaranteed to never need repacking. Holeshot also does not need repacking.
If you're looking for power, you will be disappointed if you only plan on swapping out the can and filter. You'll need power management and tuning, as stated by Rolex and if you really wanna see gains, you'll wanna get Arrow header too, but that will add a few decibels as well.