Distortion is a little high, most solid state amps these days are less than 0.1%, many in the 0.025% range. Slew rate is a little slow, even for a single-ended amp, where good ones hang around 25 volts per microsecond.
Unless you really need that much power, smaller amps generally have better ratings. But can a person really hear the difference between 0.2 and 0.02% THD? Does your listening material have many high amplitude square waves that you need a slew rate of 50V/µs for accurate playback?
I didn't list it, but the cross-talk was surprisingly high on this amp: -60 dB. That may actually be audible in some cases.
Most pro amps are in this price range, at about $300/channel. You can probably do better if you look around. Just to give you an idea, Outlaw's excellent 7-channel amp is $2149, but only delivers 300W into 7 x 4Ω.
