To hit on a few of the things not answered already, box size wise, I think you will be ok but keep in mind you are at the smallest end of the spectrum of the suggested range. The Xcon's will play excellent in the smaller sized enclosure as they don't need monster sized boxes, but it does not hurt to go a little larger. In a way, I wonder if you might be more happy with a pair of 12's on the larger end of the spectrum instead, (yeah I know down~selling is not a good business trait, but trying to figure out best choice for your needs). One other thing, if you want to stay with 15's, don't be afraid of sealing them, ask anyone who has and they are VERY happy with the results. Due to the high power handling and high output potential, there is this perception of the Xcon's have to be ported, but that is far from the reality. In terms of the TC-9, I have one also, very nice driver, but the Xcon motor is a solid hop skip and a jump above. A TC-9 driver would more or less compare with our Icon. Hope that helps.