I'm looking at the Hifonics Brutus BRZ15D4 15" Woofer DVC 4 Ohm and the Kicker 11S15L7D2 15 Solo-Baric L7 Car Subwoofer 2 OHM DVC off amazon.
Both have really good reviews, however the Kicker cost much more. I'm thinking you get what you pay for, but if this isn't the case, I would like to...