I'm running an Alphasonik PMA1000DA. 1,000w@4ohm 1,500w@2ohm 2060w@1ohm 4000w@max.
If you're interested in the alpines I am selling them on Craig's List here.
If you have any other suggestions for a 2000w rms setup I'd be glad to hear it. I want to use that extra 1000w and I have plenty of...