I like the cover, and what I've heard from the brief snippets, soooooo . . . my domestic partner, Christina, is getting me a copy of the Vanska/Minnesota M8 for Christmas. I'll actually wrap it up and not open it until X-mas Day. I decided on this strategy, rather than wait for the complete box set to come out. If I was going to go that route, then I would sell off My hard copies of M2, M6 (which I probably will sell off anyway), M7 and M10. Since you generally only get pennies on the dollar, why bother!
I also did own the Vanska/BIS M4, but the disc got lost. Don't ask - it's a long story! I have LOTS of other M4 recordings anyway.