Lampizator big7?

 Currently, I have a PSA DirectStream (Mk1, modified with APS output transformers and a separate power stage). Nothing wrong with it, but I do have the itch to try something different. Lately, I've been on a big tube sound switch (845 tube amp for example) and started to think, maybe I want a tube DAC? Lampi? Aqua?

What's everyone's impression of the Lampi Big7? Or is there another DAC I should try?