I also loved the +proac’s I used to run them with tubes as well
Other options that come to mind are AudioNote ANE’s, Living Voice Avatar IBX own a pair and run them with 8wpc they are sublime if you have the room for them to breath think 36" min from the front wall) Coincident speakers, Omega (surprisingly good for the money full ranger), Rethm Speakers these are very interesting full range drivers augmented with powered base i’m even eyeing them and there is a used set on for a hell of a deal right now). All the above are very good choices for low output tube power amps. horns as some may be an option too.