Please recommend speakers for 45 watt SET amps

I had those Audio Mirror amps for many years, driving EgglestonWorks Fontaine speakers. I believe the main reason they drove them so well, and the sound was superb, was that the mid drivers had no crossover and the tweeters only a simple L-pad (one cap and one or two resistors), and never dipped below 5 ohms. Crossovers, depending on design, can eat power. The sound was sublime. They had the perfect combo of smoothness with the proper amount of bite. Thoroughly enjoyable for hours on end listening sessions. Beautiful speakers with beautiful sound. They no longer make the Fontaines, but its replacement model is the Emma EVOlution. 

Check out Verity Audio speakers.  They fly under the radar a bit but are tube friendly and are extremely musical and natural-sounding speakers with exceptional 3D imaging and soundstage capabilities.  Made in Canada. 

Thanks so much for all the recs. I’ve got a lot of research to do. I wonder how the Fynes would sound.  I have had thee of their dealers recommend them to me.  Has anyone paired the 502SP (or 702s) with SET amps?

fynes should sound just fine... 😉😁

seriously, vlad's 6c33c based monos have real world power for many many speakers, don't need the very high efficiency types, so if you have those amps, the choice of applicable, well mating speakers is ample

just stay above 88 db-m/w and below 4-5 ohm impedance for best performance

My Hornings sound awesome with an 8W amp.  Here are a couple I see for sale:

https://www.hifishark.com/search?q=horning