John:

If you want to be able to run 5.1 channels (or even 7.1) from your 861, you actually need 2 analog output cards. I assume you can use AO03, but with the v2, you may need the older AO02 instead. Not sure how easy or difficult it will be to find these cards.

Simon

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.