I don't think 861 upgrade will be pricey. CPU/processing does not seem to be different from v4 to v6 right?. For analog 861 I am interested in IE44 (for newer HD621 connection) and OA08/OA18..that's about it. Hope M can make it a modular upgrade.

Ohh 800 RIP. I am glad M has decided on clear strategy to move forward.

Cheers,
Kishore