That's some nice Schiit you have there partner. Just got a Schiit Modi Multibit 2 in today and love it.

I have a Vali 2+ and it's very nice as you would expect from Schiit but in the end I ended up liking tubes that sound more more like a normal clean Solid State amp, lol. Schiit has come out with a newer version of the Vali 2 which is the Vali 2++, has a different pinout but is otherwise virtually identical to the Vali 2+, so make sure you get the right tubes if you get this model and not the ones for the old one, at least not without an adapter.

Vali 2 is not a bad way to get a taste for tubes but the ones I like tend to be more expensive and the amount of tubes I acquired over time I probably could have purchased a better amp or headphone honestly but oh well. Hard to know what you will like until you do and it was fun rolling different tubes to get varied changes in sound.