The Gallos are power hungry and have a difficult load to drive as I recall.
In these situations, you need a high power, high current SS amp usually in order to get optimal performance.
What is your budget?
You might consider looking at some of the newer Class D amps out there for best value.
Using a tube pre-amplifier will also help determine what amp might work best, generally those with higher input impedance, say 50K ohms or above.
I've researched amps for this kind of application extensively recently in looking for an amp that fit my system optimally.
Amps I know that qualify worth considering would be some Musical Fidelity SS amps, Wyred 4 Sound, newer Bel CAnto ref series models (not originals that use stock Ice Power modules with only 10K input impedance), and SS amps from companies like Audio Research and perhaps Cary that also specialize in tube gear and design their SS amps to work well with tube pre-amps.
In these situations, you need a high power, high current SS amp usually in order to get optimal performance.
What is your budget?
You might consider looking at some of the newer Class D amps out there for best value.
Using a tube pre-amplifier will also help determine what amp might work best, generally those with higher input impedance, say 50K ohms or above.
I've researched amps for this kind of application extensively recently in looking for an amp that fit my system optimally.
Amps I know that qualify worth considering would be some Musical Fidelity SS amps, Wyred 4 Sound, newer Bel CAnto ref series models (not originals that use stock Ice Power modules with only 10K input impedance), and SS amps from companies like Audio Research and perhaps Cary that also specialize in tube gear and design their SS amps to work well with tube pre-amps.