Need and want are two different things. I'm pretty sure the old HD is not the same as the current HD series.hd3 15s dont need that much power to get them going, and if you dont know what your totally doing, your going to end up with 2 big paper weights, I would say your better off looking for 3000rms at what ohm final you need 1500 per woofer, I know first hand after owning the old aq hd 15 and now called the aq hd3 and they didnt like more then 2000 for daily driving, and if you ask DJ from audioque he will tell you first hand you dont need that much power.
As it states i need to find 2 amps that put out a true 2500RMS a piece. I would like to not spend more than $1500 but the cheaper the better as long as it is quality equipment that is not overrated.
Yeah there are a lot of good buys on the used DD Z1's right now...I'm getting ready for 4 of the new DD Z1a's myself...I read that, but if he is saying 1500$, but the cheaper the better, he obviously doesnt want to spend 1500$ if he does then pick up a used DD Z1 that will blow your mind hands down DD Z1 for the win.