I just hooked mine up a few days ago, I replaced a Marantz AV9000. The sound and color is worlds different (read: MUCH better). Had a hum bar problem and went through three different Marantz processors, still had a little, none at all with the RDC-7. Setup is very clean, I use it with a Sony 11HT projector.
I will be glad to write more as I learn more about this preamp. So far, it is the best thing I have done to my system.
Hope it helps a little.
Thomas Tomczak