That's not a large box for a 12" that's a too-small box for what is essentially the cone area of a round 15. Get that joker in 4-5 cube tune higher and see what it does for you.
I did forget the Comp R. I saw a guy running those a couple years back at a few shows and they were really impressive for their class. They did really sound good.
Also Kicker actually does their own R&D on amps. Which forum boner company does that? Nobody, that's who (except maybe Brazilians). They call just call China/Korea and ask what 20 year old amp design they can slap a brand name on.
Let's wait until one of the popular companies who sells "5K" amps actually designs their own something new before we **** on companies that still actually do R&D (like Kicker, Alpine, Rockford, etc.).