If a person were to round up all the solid state amps out there and eq adjust them for perfectly flat response, why would one amp sound "better" than another? What makes a Walter woods or an Iamp sound better than a behringer bx3000t? clearer? punchier? wamer? If it is higher quality components, what about the components makes them higher quality? Is it greater headroom? Some sort of greater analog/digital resolution (bitrate?) higher purity wiring? less resistive soldering on interconnects?