I too am unfamiliar with the Unico but I power my Druids with an Onix/Melody SP-3. It's a 38 watt per channel tubed integrated and the level of performance is staggering. I actually bought my Onix from one of the guys at Zu. It mates very well. Anything with tubes from 30 watts up will drive the hell out of Druids. I also own an ASL Orchid with 3.2 watts per channel and it sounds heavenly but lacks punch. Go to AV123.com and check out the SP-3. Maybe you can get an idea there as to how it compares to your Unico.
Question for Zu Druid owners...
Hey, I am currently saving up money to buy some Druids and I'm wondering if by any chance somebody has tried pairing them with the Unison Research Integrated? I chose the Unico because I wanted a certain degree of valve magic but without the hassle of worrying about tube life, leaving equipment on, etc. Also, I wanted an integrated that had good dynamics, which the Unico supposedly has (I haven't heard it yet, just got one of Audiogon). If anybody has heard either of these and has any idea of how well they may or may not match up some opinions would be greatly appreciated. If nobody has any idea how this may sound, I will post my own impressions (I am by no means an audiophile, however, at least not yet...I just want to build a solid music system that I can set and forget) when I get the money to buy the Druids.