Speakers that are good with tubes

Give the Golden Ear Triton 1r a listen. They are 92 db sensitivity, relatively benign impedance curve, and each contain a 1600w amp to handle the bass which makes driving them with tubes very easy. I drive mine with a pair of 50w Cary monoblocks and couldn't be happier. 

J.Chip

I drive my Wilson Maxx 2 with tubes because I prefer the sound to using a very good solid state amp.  Tube amps tend to be lower output power so you need speakers with fairly high sensitivity.

Electrostatic speakers are wonderful if you like them, I have heard dozens driven with every type of amplification.  Sorry I've not heard one I liked. It's purely personal I know however, as more than one HI fi expert and reviewer has observed, "choose which type of fake you like", nothing in your lounge room sounds like the real thing, good even great, particularly to you but still fake.

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.