Zu audio advice

Have a pair of Zu Def 4s. If you like tubes, and I do, they can absolutely sing. Have heard that the DruidV is another winner but wouldn't trade. Above poster is right about placement, took some experimenting. Also took some break in time. 
Only problem is I can't stay out of the basement. 
Go to the Roundup thread. Just type in roundup.

There is a pair of Soul Superflys up now on this site. 

When I got back on the music appreciation hobby and researched everything for about a year, really researched it to the point of reading books on active crossovers, Floyd Toole, Jim Smith's Get Better Sound and a few more my prevailing thought was to get away from crossovers in the speakers.
Many things affect the signal path but taking the crossovers out of the  picture removed the veil I had always heard. I will say the need for clean power became more evident so addressed that. All in all, cleaning up the signal path paid big dividends. The Zu guys know this and develop their products accordingly.
Their speakers aren't warm or soft but the sound is full and has an overwhelming sense of vividness. Good luck with your choice.