I've been trying to find the same thing! I've asked the same question a few times... and it looks like Audiobahn is pretty good. P.s, I've found Rockford HX2's for $89 on the net somewhere... thats a really good price, any other place that has them is asking from $120/180 a piece. Thats what I'm running now, 2 HX2's and they get pretty loud, but not much sq... but sense you're just looking for spl, "no worries!":-) lol