I also used the Unison SR-1 temporarily.
I had to get back to full tubes (The SR-1 is a Hybrid)
I emailed Unison about the difference in the Unico and the SR-1.
Besides the obvious difference visually (the SR-1 is the typical Italian visual aesthetic, shiny/wooden/ really, really beautiful) while the Unico is the typical, if nicely finsihed, silver faced box, Mr/Dr I cant remember his name designer/owner of Unison actually emailed me personally, to say that the SR-1 was the "more substantial product"/
Take that as you like. I can't remember the price difference, but had I never heard a full tube setup with some balls, I would have never looked back. That SR-1 was damn smooth, 2 tube input, ss output, it could rock, and it had the best remote ever- RF vs IR, so that it can see through walls, etc.
Anyway, I say get a tubed integrated, but if you're scared of 10 tubes (my Rogue is auto bias, and never makes a peep of tube noise) and you don't want to jump in with both feet, I found that the Unsion offered good performance for the $.