have you heard the unison players ??
I have - it is probably some of the most awful sounding gear out there (even my Wife thought so). Slow, lifless, with tonal balance that was always off in one way or another even for different tubes: Exaggerated midbass and lower midrange, grainy highs. The Audio Aero Prima is much more well balanced, detailed and resolving with better instrument separation and more realistic portrayal of instruments. Of course only my own experience, and your might vary, but I could not get it to work with several different amps (amongst other the Unico integrated).