I'm look to see which ones are better overall I guess.. I am just looking at those subs. I really am looking at a pair of tens. I want to run 1000watts or a little more each. I've heard about the aspin type-r's, how are they? I mean is it good to have an amp with the sub? I have been looking at these two subs also. the Power Acoustik MOFO-10 Car Subwoofer and the Alpine SWX-1042D Car Subwoofer. Which of the three are better in general (clean and crisp, and a hard hitting). I would perfer an enclosed box, but it's not a have to have kinda thing. I usually listen to rap, rock. If there are some websites anyeone could help me out with in learning about car audio that would be much appreciated. thanks.