Many thanks for the advice. I will look for the Edge amps and the 2BSST.
I am actually powering the Vandersteen 2C and it is a home studio monitor situation, so I am listening as I work on music. Composing, mixing, and then mastering. I have a Simms Celeste currently and want to upgrade. The front is are Manley tube mixer and EQ units. In the small, 10x14 room, two tube products is enough. that's why "cool-running" is my wish for the amp.
Please, Welcome any more suggestions for amps in this small room.