I have Gallo 3.1's
I have ran in order:
Response audio modified Jolida 502brc Integrated 60wpc kt88 Ultra Linear Class AB
McIntosh MA6900 Integrated 200wpc SS
Wyred 4 Sound ST1000 500wpc Class D with Cary 98SLP preamp
Clayton S40 50 wpc Class A SS with Cary 98SLP preamp
Ayon Spirit II 60wpc Pentode 40wpc Triode Integrated kt88 Class A
Unison Unico SE Integrated 140wpc SS Class AB with triode tube input stage
Yes the Gallos do well with tubes, I love tubes, but you aren't going to get loud rock from these speakers with tubes. Not kick butt bust your balls hard rock.
I would suggest you get a high power SS integrated for your listening style. The Unico SE I am using right now would be a top contender. Tremendous grip on the bass without any strain or bloat at high volumes. Surprisingly close to the Clayton/Cary combo for 1/3 of the cost.
I would think Unison, Krell, wyred4sound, and Musical fidelity integrateds which are all brands I have had at one time or another would be a good match. I am sure there are many more but from my personal experience these should make these speakers stand up and rock. All can be had for $1,500.00 or less.
FWIW I have found Morrow Audio wire to work very well with Gallo speakers.