Are the L3's a less expensive version of the L7?
Haven't had any experience with the square subs, but I've still got my original production 90's 15" solobaric & it still sounds great.
Not too sure about the new RF stuff, but back in the day they made incredible stuff. I'm going to be installing my 90's 12" Punch subs in either my truck or expo when time allows.
From what I've seen, the prime series RF & Comp kicker stuff aren't that great... something has to be up when you can buy kickers at wal mart
Post up some pics of your setup too