I've heard of all the stuff you guys are talking about, but most of it is way too expensive for me to afford right now. JL, forget about it, I will never buy a JL product. Two of my buddies have JL setups, one has 2 w3's and one has a w7. Yeah they beat pretty hard, but I could find something that beats just as loud with maybe just a little less quality for half the price. Shit what are w7's going for new now, still $750? I could get 2 R's and an amp to run them for a little over $500 bucks brand new, hifonics amp too. Plus I've heard many times that the quality of JL's subs isn't what they say it is from people who have worked for JL. So yeah, I agree Slider, JL is way overpriced for what else is out there. I've been looking at Diamond, I know someone that has 2 D3's that are pretty damn loud, but everything that I want is too expensive for me right now, especially with the holiday season coming up.
EDIT: Also, Fi is the shit. I've thought many a times of doing a BTL setup and running that bitch at 4000 rms.