Re: 10" SQ sub
Perfect IMO is a better driver than the Type-r as far as simply SQ goes. Its problem lies in the fact that its RMS rating, is its absolute max power handling, it hates getting more (I know some moron is going to post saying he sent his 600 watts, but it was for a short period of time, and if not, it blew soon thereafter). THe Type-r is a much more SQL driver, in a box that small, you may not be happy with the Infinity's output. Go listen to both of them, then make you're decision. A solid sub for you to check out may be an Image Dynamics, www.sounddomain.com sells them authorized.
Alpine CDA-7995, A/D/S 3 Series Comps, ED 8A, SoundStream Reference 604, 98 Civic Sedan