EarthQuake or Kenwood Class D amp?

I have a big probox  enclosure with 2 12" mtx subs I have a old jbl BP600 mono amp, I am looking at a new amp I have run across a EarthQuake amp power series class d mono amp with 2000watt and has 500 RMS @ 4 ohm

for the same price I can get a Kenwood Class d mono 1800 watt amp with 450 RMS @ 4ohm

but  the only real difference is the kenwool has a subsonic filter and the earthquake did not both have low pass filters on them .     any help would be thankful

I know the Earthquake PHD2 was a great 2000W RMS Amp into 1 Ohms. I would choose the Earthquake anyday...

I just install a Kenwood KAC-9152D mono class D amp driving a Pioneer TS-W3004SPL sub (3000W max/1000WRMS) in a 1.25 cu in QLogic box (sealed). The sub is set up at 4ohms with the voice coils wired in series. With that configuation, the Kenwood can supply 500W RMS. VC's wired on series would be 1ohm with amp able to supply 900W. Since I was looking for sound quality instead of SPL, I  have it set up for 4ohms (lower distortion levels, if amp isn't clipping). I haven't even gotten close to turning it up all the way; my 88stangGT's back hatch glass starts flexing!! I just wanted to let you know I've had good personal experience with the Kenwood amps. I have a 4 channel KAC-8402 powering 6 front speakers, sound is great. They seem to be very quiet distortion free amps & haven't had any problems with the KAC-8402 that's been in use for more than a year now. The boost level & frequency adjustable remote is great on the sub amp! The amp/sub combo produces tight accurate distortion free thump; most people think I have more than one sub!

Can't comment on the Earthquake, as I know nothing about it; compare the specs, although sometimes that's hard with certain manufacturers