I have been reading all the good things about these subs on this message board but I know Zero about them. What basically can I expect from one series of sub to the next. Is there that extreme of a difference? I was really suprised when I hooked up my 8" L7 with 400watts. How would these compare in SPL, SQ to say.. Kicker l7, comp, RF punch? I am trying to choose a sub 10" or 12" doesn't much matter to me.