Addendum:I guess you need to keep the AVR Pre for BiAmping though?
I use a Sony ES3100 for home theater purpose, simply use the aux passthrough to control volume through on source. New Sony ES series has a pretty clean passthrough from what I have read - I know its unbalanced which isn't optimal.
My goal when I get some more room is to get a Pre with balanced that can go to B&K but then I will pick up a better amp to potentially drive the towers... I am 80% Music 20% theater.
That Quad seems interesting - never heard of them. I can also say that the Wadia has a much better sound / sound stage then the parasound it replaced... I was just making sure I bought the right product.