I currently have 2 10" Kicker Comps in the back of my cougar. A buddy of mine wants to get rid of his 12" JL w3 in a ported box, in favor of something new, a pair of new tens. He wants to trade me, plus have me pay him a little cash. That way he can use my 10" sealed box for his new subs. Good idea or not? Anyone heard this in a cougar before? If so, how did it sound?