I have a Sky+ which I use with the Avant, and a Panasonic DMR-EH60D that I use with the AV9000. I confess to really hardly using it! I can switch it on, change channels and play the DVD. I have never actually tried recording using the Beo4 (shame ) - I use the DMR-EH54D codes.
The Sky+ is fantastic and integrates perfectly in a B&O link system.