@Hicks thanks for the research and response.
@BentZero. I did think about that, but I really need to upgrade the pre-part as well. I often get HDCP handshake issues and the sound just goes and need to restart the amp. It's pretty annoying. I think it's only HDMI 1.1, so it's pretty old spec.
Just need to get the wife's buy in now. Shouldn't be too hard though as she hates the look of the old Kefs