Thank youfor your response. My room is large, has little echo, but is not treated. Not looking to increase brightness. Want a bit fuller sound, with special clarity on vocals and bigger impact (on rock, although I listen to all kinds of music). Want vocals completely separated from instruments and little congestion when numerous instrumental lines are going simultaneously.
I use 225 w/ch mono block tube amps which are switchable to 125w/ch triode mode, as opposed to ultra Indra.