Really great information - in particular, many thanks to you Ronnie.
I think I'm sold. I have been tempted to go with Sooloos but the 'Apple solution' with iPad is just sooo appealing. Also, superficially I lose nothing in terms of sound quality vs. a Sooloos implementation. Apodising in the new 861 or via the HD621 with the Kanex HDMI gizmo Ronnie highlighted, is eminently possible.
Question is how can M respond to this in form, function and price?
Also, I'm thinking of junking my 10 year old Crestron touch panels in favour of iPad. Not only can I use iPad+ for a new music server-based system, I have a delightful, sexy, light, slim panel for all my home automation (inc. home theatre) applications. This alone will save thousands in terms of upgrading my Crestron panels and bring everything I need onto a single 21st century panel. Brilliant!!
Zander