Phoenix, while great at what it does, is not my type of amp. I found it to be little too edge and harsh(?) sometimes.
I am eying either this (after your great review) or NDA Sonnett. The price wise, Sonnett is a lot more expensive, but if I have to, I will add more fun and get Sonnett.
WA22 is also very tempting, but it's little over my budget after spending so much on can/source/amp (which I just lost nearly $400 for 1+ month use)
Have you had a chance to audition the Sonnett? If yes, how does it compare to this? Which amp would better suit me? I like more rounded and little warm sound (which is why I am leaning toward the tube amp).