Looking for warm sounding speakers

What size/range of speaker are you looking for?

I would look at any of the French speaker manufacturers: Triangle, Focal or (my favorite) JM Reynaud. All excel at the sound qualities that you are looking for:

warm sounding laid back speakers not aggressive in the mid range and not hyper detailed

Triangle and Reynaud will work espacially well with tube amps. With your electronics I would take a hard look at something in the Focal Chorus line or the Micro Utopia if you a monitor would work.