I'm powering my Martin Logan Spires through a pair of Soundcraftsmen pro monoblocks (600 W).
I've found a few candidates that meet your budget:
Blue Circle BC-8 (current bid at $1,700): https://www.audiogon.com/listings/solid-state-blue-circle-audio-bc-8-mkii-mint-condition-monoblock-amps-w-boxes-rare-2016-11-02-amplifiers-32117-holly-hill-fl
- 225 W @8 Ohms, 1,200 W @ 1 Ohm
Parasound $2,100: https://www.audiogon.com/listings/solid-state-parasound-jc-1-400-watt-monoblock-amp-2016-11-04-amplifiers-91406-van-nuys-ca
- 400 W @ 8 Ohms, 800 W @ 4 Ohms, 1,200 W @ 1 Ohm
Classe CAM-200 $1,695: https://www.audiogon.com/listings/solid-state-classe-cam-200-2-monoblock-amplifiers-2016-10-31-amplifiers-78735-austin-tx
- 200 W @ 8 Ohms, 400 W @ 4 Ohms
I've found a few candidates that meet your budget:
Blue Circle BC-8 (current bid at $1,700): https://www.audiogon.com/listings/solid-state-blue-circle-audio-bc-8-mkii-mint-condition-monoblock-amps-w-boxes-rare-2016-11-02-amplifiers-32117-holly-hill-fl
- 225 W @8 Ohms, 1,200 W @ 1 Ohm
Parasound $2,100: https://www.audiogon.com/listings/solid-state-parasound-jc-1-400-watt-monoblock-amp-2016-11-04-amplifiers-91406-van-nuys-ca
- 400 W @ 8 Ohms, 800 W @ 4 Ohms, 1,200 W @ 1 Ohm
Classe CAM-200 $1,695: https://www.audiogon.com/listings/solid-state-classe-cam-200-2-monoblock-amplifiers-2016-10-31-amplifiers-78735-austin-tx
- 200 W @ 8 Ohms, 400 W @ 4 Ohms