When I switched to a digital amp from Pascal, I did what Rusty suggested and ran balanced and controlled the volume in the digital domain. A friend who had a similar set up decided to try an analog pre, and he really liked it. He said it fleshed out the music, and I have to admit it did a little something for the better. In his system I heard the benefits. I liked what I was hearing at home so I did not try it there.
JCarney