Tube Amp for Avalon Eidolon Speakers


Anyone has good recommendation on a stereo tube amp for the Eidolon speakers? A stereo amp will work better with my setup for equipment placement. Preamp I am currently using is ARC Ref-1 which I like. My solid state amp Classe 401 sounds very good but you all know why I want to use a tube. Thank for any idea.
cmtong