Speakers that are good with tubes

Any model by the long defunct Equation brand. Have some Equation 7 and honestly play better than MANY of the Harbeth, Spendor & Rogers speakers I've been used to. If you come across a set, buy'em. 

When I had my Focal Diablo Utopia III's, they loved my PrimaLuna DiaLogue Premier HP amp . . . It was a very good match.

Omega speakers loves tubes.Some Tekton speakers as well.

Blumenhofer FS1 speakers

If you like the sound of Maggies, but don't want or can't afford a 300 watt tube amp, look into the Eminent Technology LFT-8. Like Maggies, the LFT employs planar-magnetic drivers. Unlike the Maggies, the LFT is a tube-friendly loudspeaker, it's modulus of impedance 8 ohms and above. And if you bi-amp (two pair of binding posts are provided: one for the p-m drivers---180Hz up, another for the woofer), the impedance of the panels is 11 ohms, even better for tube amps.