I have similar information from my dealer. No way to add new cards to v4 so the trade-in will be for a new unit. He wouldn't tell me price but certainly implied that it was well north of $10K. Clearly have to wait for official details.

My Kit: 861v8+ID41, 800v4, UHD722, MD600, MS600, MS200, Oppo BDP-203, Genesis 201, Genesis 350 SE, Genesis S4-8 Sub, BG 520i, VTL MB450 II, Krell Showcase 7, Genesis 928 Subs, Danley DTS10 sub, SVS Ultra 16 subs.