Ralph, AGD and others make Class D SS amps that would work...
In a broad stroke, I agree.
Whether changing amplification will provide...
openness and dimensionality of tone
...is another question all together.
"Openness and dimensionality of tone" are characteristics I have heard primarily from speakers with high sensitivity, and easy-to-drive impedance curves. So, a loudspeaker and amplification change might be in order.
But yes, auditioning an AGD Productions or Atma-Sphere GAN amplifier would provide a good data point.