My little brother has a gothic series Power Acoustik 1600w 2-channel amp, and we would like to hear any expert opinions regarding the choice between a pair of Volfenhag ZX-4812's and a pair of Kicker Comp VR 05CVR124 12's. He wants to run his amp at 2ohm, and he's basically curious to know what a professional has to say when comparing both subs. SPL, overall performance, cost efficiency, frequency range, etc. Your knowledgeable input would be greatly appreciated and put to good use! Open to other suggestions regarding subs within that price range as well. Thanks.