yes i have listened to countless vehicles at daytona, every year i go. like i said before, yes they sound good but they ARE ghetto. every punk ass white boy with his hat sideways wants some JLs, of because their cheap speaker looks the same as their better speakers - of course "they have the good ones".
Yes PPI made excellent stuff - i was standing there when alma gates set the record (at the time) with 64 10" PPI's in her bronco, before she went over to Kicker.
MB Quart produces some of the finest (if not best) speakers money can buy, so we agree there too.
Xtant was making some fine products as well, i was fond of their amps.
there are better subs available if you want clarity than JL's, and there are better subs for winning SPL and DB contests than JL's.
for quality, i'd take eclipses, infinitys, auras, or even memphis's (which are very nice AND boom like hell btw) over jl and for spl i would take kicker solo x's, or even some old school cerwin vega stroker subs (remember the adjustable cone position with the metal rod sticking through the middle?)over the jl's