All fitted - very nice chap called Dennis arrived just after 8. Replaced the dish as it was getting on a bit! Have the HD box working through the Avant for the moment and the Sky+ through the AV9000 - both working with a Beo4. The BV10 will go in the place of the Avant and the AV9000 will go upstairs with the Avant moving into the playroom ( had to think what to call this room as it is a study/family room/dog room and anything else that it needs to be!!)
The same cards are used but the box is programmed to work with the card and undergoes an upgrade on line. Dennis did a lovely job, using one cable with two cores so no more holes needed to be drilled.
HD looks much the same on an Avant as SD if truth be known but I wouldn't expect much different! Have a spare Panasonic Sky box now! The Sky HD is a Samsung one - the sort I had wanted - and is made in Slovakia. Uses the same codes as the Sky+ so I didn't have to change the STB settings.
No HDMI lead at present - will need quite a long one though!