I'm new on here, and I'm loving the site, but I have a problem and was wondering if you guys could help me out, I have decided to upgrade my system, currently I have 2 db drive k5s in a 4.5 cubic ft enclosure powered by a 2400rms db drive amp, they are rated at 750rms each but I'm pushing them close to 900rms each,they are loud and sound good, the one con if any is that they dont hit the low bass good like my friends hcca orions. I hit a 141.5 with this setup in a 2000 crown victoria, with has a huge trunk. My question is should I get two more of the k5 12s and another 2400 amp and have 4 12s in a 8.5 cubic ft box, each sub would have a little more than 2 cubic ft, or get 2 12" American bass HD 12s on two of the same db drive amps. The AB HDs are rated at 1500rms each but people tell me they will take 2000rms each easily, I would have them in a 9 cubic ft enclosure. I already have an upgraded altenator, extra battery, and 0ga wiring. I'm looking for which setup would be the loudest, best sounding, and produce the most sound pressure, to compete with my buddy's orions without copying him. I'm around $700-$800 budget range on the subs, but I got a guy who can get me 2 AB HD 12s for $600 I would like to hear your opinions and thoughts.