I liked the Vipers very much. They just did not fill the room and did not have that much base. The Montanas are large and have much more of a presence. I traded in the Bat 75Se and got the solid state Bat250. Theoretically it was a step down, but the tubes were too hot and I have a tube pre amp, dac, and cd player and did not want to worry about trying to figure out which tubes were causing a problem when the time came.
I am very happy with the setup. Next is a power conditioner.