Amp recommendations

If you are willing to spend that much I would probably match the subs up with a JL Audio 500/1. I have seen this amp outperform many higher rated amps hands down. I highly recommend Jl amps as the quality of these amps are unsurpassed, what I like most about the JL Audio /1 amps is that they give you the same output no matter what, as long as the ohm load is between 1.5-4 ohms you are set. Also you don't need something that will put out 800 watts rms, rms on your subs is 400. You should be able to score the 500/1 on EBay for $350-$400 brand new. If you want another option Memphis Car Audio makes some really good amps and you should be able to score a 1000D for around $400, in fact I'm selling one.