Ok, I’m a self admitted tube guy. However, I’m a financially sensible tube guy. My Pi3 with Allo Boss dac is hooked up to a tube headphone amp from Monoprice that lives on my nightstand(my pi3 is in a custom “case” made from broken skateboards). This amp was a steal when it went on sale a couple years ago. Now I have a new toy, a Reisong Yulu M2 single ended EL34 amp. For less than $300usd delivered, I have a decent looking, dead silent(seriously, volume knob up all the way and ear to the tweeter silent. I thought it was broken till music poured out), two input, 8 watt amp that so far has blown me away in my small room(approx 3 meters by 4 meters). I’m loving the sound of this thing and that’s with the stock tubes. Rolling might wait a bit till I’ve lived with it for awhile.