I’ve owned the Spendor S8E using 50 watt tube amps. I doubt that you would go wrong with them!
Here are some reviews!
https://www.theabsolutesound.com/articles/spendor-s8e-loudspeakers-1
https://www.6moons.com/audioreviews/spendor/spendor.html
Here are some reviews!
https://www.theabsolutesound.com/articles/spendor-s8e-loudspeakers-1
https://www.6moons.com/audioreviews/spendor/spendor.html