which one would you pick, I need somewhere between 1.5-2kw rms at 1 ohm, and I dont want to spend more then $400. If anyone has a better idea please help me out, thanks.
Have a look around and see if you can find a Diamond D61500.1 used but in good shape.
Will give you the power you're after @ 1 Ohm (rated at 1500 but generally benches somewhere beyond that) and can be had for under $400 used (I gave $350/shipped for mine and felt it was a bit high but wanted the amp anyway...)