A ZV6 15 for $500 is a good deal, assuming it's not damaged. Your amp puts out 2k watts rms @1ohm, Correct? That would definitely work. 2 12"s could cost more than $500. Take my 2 IA DR 12s for example. I payed just under $900 for them, shipped. It's all up to you and what you're willing to spend.