I have a set of these fine speakers arriving soon. They will reside in my audio-only system. I know they are power hungry (4 ohm nom impedance & 86dB sensitivity), but how does that translate into the real world? I will be filling a 20x20 room. I've been looking at amps from McCormack, CJ, and Bryston. Each company offers a 100-150 watt amp, and a 200-300 watt amp. Does anyone know if the lower powered amps can still make these babies sing?