If you wish to stick with class D you might want to look at Bel Canto product. Specifically e-One 1000 or 500 monoblocks
Specs for e-One 1000
1000W into 4 ohms, >500W into 8 ohms
Minimum Load: 2 ohms
Frequency Response: +/-0.5dB 20Hz-20KHz, all loads
THD+N: 0.007% 1W, 1KHz, 4 ohms
IMD (CCIF): 0.0007%, 1W, 14:15KHz, 4 ohms
Output noise: 90uVRMS A-weighted 10Hz-20KHz
Voltage gain: 27dB (single ended or balanced input)
Damping factor: >1000
Output Impedance at 100Hz <8 milliohms
Dynamic Range: 120dB
Input Voltage for Max Output 3Vrms
Input connections: Single-ended RCA or balanced XLR
RCA input impedance: 100Kohms
Balanced input impedance: 200Kohms
Output connections: 1-set WBT 5-way safety binding posts
Standby Power: 15W
Size: 8.5x3x12[inches], 216x76x305[mm] (WxHxD)
Weight: 15lbs, 7Kg
e-One 500 specs
Power Output: 500W 4 ohms, 250W 8 ohms
Power Output 1% THD: 450W 4 ohms, 225W 8 ohms
Minimum Load: 3 ohms
Frequency Response: +/-0.5dB 20Hz-20KHz, all loads
THD+N: 0.003% 1W, 1KHz, 4 ohms
IMD (CCIF): 0.0003%, 1W, 14:15KHz, 4 ohms
Output noise: 35uVRMS A-weighted 10Hz-20KHz
Voltage gain: 27dB (single ended or balanced input)
Damping factor: >1000
Output Impedance at 100Hz <8 milliohms
Dynamic Range: 121dB
Input Voltage for Max Output 2Vrms
Input connections: Single-ended RCA or balanced XLR
RCA input impedance: 100Kohms
Balanced input impedance: 200Kohms
Output connections: 1-set WBT 5-way safety binding posts
Standby Power: 9W
Size: 8.5x3.5x12[inches], 216x76x305[mm] (WxHxD)
Weight: 15lbs, 7Kg
These have a lot of pluses they very small and have lots of power at a fairly affordable price point. However they do have the class D type sound so if possible I would suggest you take a listen before you buy.
I heard these with Maggie 3.6's and thought they did a marvelous job with them. Maggies like power and these little guys have plenty of it.
Morw info: http://www.belcantodesign.com/prodmain_amps.html