I have Beolab 3 MKI and enquired about upgrading to MKII. The cost to do the upgrade was $1800.00 USD. The high cost they said was due to a change in the manufacturing process and that most of the components would have to be replaced. I was absolutely astounded and of course decided it wasn't worth the cost. Its probably true that a change in supplier was also a major factor.
This is an area where B&O could do better. They should send an email to registered users about upgrades and the cost when there are changes. Sometimes the upgrades are very beneficial and sometimes they are not.
Beosound 5 BL9 BC2 BL8000 Beovision 7 BL6002 BL11