The natural pairings with the Bel Canto DAC3 are the Bel Canto power amps. If you're looking at a stereo amp instead of monoblocks, the REF150S or REF500S will work very well with the DAC3. The two amps be the same from a quality perspective, just differences in power. The REF150S will give you 60W per channel into 8 ohms and 120W into 4 ohms. The REF500S will give you 200W per channel into 8 ohms and 400W into 4 ohms.