@meiatflask Yes, class A amps do tend to give off some heat. That's why most of them have significant heat sinking as part of the design. My Krell FBP300 gets warm, but not too hot to touch. Nonetheless I'd think twice if I had toddlers around.
If it were my money, for SS amp, the older Krells designed by Dan D'Agostino or the Pass XA series would be at the top of my list. Bryston and Coda are also solid choices.
Honestly, with your Maggies, I'd stick with the tube amp and move up to Maggie 1.7is or consider a different tube design like Atma-Sphere M60s, a BAT 6C33C-based amp, or an 845 or GM70-based SET. You could alternatively upgrade your DAC, but that won't make as signifcant a change as amp or speakers, given what you have now.
You haven't specifically defined what "sound better" means to you...IMHE, EL34s can rock really well, but many of the other tube topologies can provide more nuance, transparency and delicacy that for me, bring small scale acoustic music and other stuff you described to life. Cheers,
Spencer