i have the Ark, sold my first one to buy wheels, and missed it so much i bought a new one.
The sound is by far my favorite, and i have heard almost all of them in person.
I did add berk test pipes to the mix, so the sound has gotten raspier, however i still like it a lot
after
ARK Catback Exhaust w/ Berk Non Resonated Test Pipes (Vid)
before
ARK GRIP Exhaust Review Pics Sound Clip