I've been looking to purchase some subs+amp and have come down to two choices. These. Amazon.com: Dual BP1204 12-Inch 1100-Watt Illumination Bandpass Subwoofer: Car Electronics Plus this Rockford Fosgate P500-2 1000W Max, Punch Series Compact 2-Channel or these Kicker DC122 (10DC122) Dual 12" Comp Loaded Subwoofer Enclosure plus this Kicker ZX300.1 (11ZX300.1) Class A/B Mono Amplifier Car Amp The duals are more powerful but aren't as sensitive in the frequency range as the kickers. Really though I'm not that savvy with car audio and that's why I'm looking for an outside opinion.