Looking for an AMP to match JA Pulsar and Lampi

Sorry, I don’t know anything about Qualiton separates, but given the high praise for their x200 integrated I’d expect good things.  For what you’re looking for I’d go with a tube pre and solid state amp, and a relatively neutral tube pre like ARC or Octave with a warmer amp like Coda might be a good match.  Or a something like a VAC or Audio Hungary pre with a Hegel amp may also work well.  I’d avoid VTL as their customer support/service has a poor reputation unless it’s somehow better in Europe.  I still think a hybrid integrated like the Unison Unico or Class A integrateds from Gryphon or Vitus could also work really well. 

For what you’re looking for I’d look at a used Gryphon or Vitus integrated for solid state, and a hybrid integrated like a Unison Unico 90 or 150 would also be very well worth exploring as you get some tube magic with solid state power.  I’ve also heard the Pulsars sound excellent with Hegel electronics as well although they’re probably a little less warm or full sounding than the others but may still work well with your tube DAC.  For an all tube amp I’d look at Audio Hungary or Octave.  Just some ideas off the top FWIW, and best of luck.