Upload & Sell: Off
I can only speak for myself. But the reason I feel no "wow" over a 6D is because I basically have already been using a camera (5DII) for nearly four years now that for my purposes is probably just as good. (And if I needed to buy a replacement for it, I would probably just buy another 5DII.)
Art, this is the tough call if the 5D3 is not within budget, the AF looks great, but no interchangeable focusing screens. This really is my only gripe, I could stretch my funds to get the 5D3, but I've a bunch of older FD glass that I'd love to use, and that a ground glass IFS would have made most of it usable (I've an Ed Mika adapter that works great on my croppers) so I'm bummed
The 5D2 is proven, tested, solid, we all know what a great camera it is, my crop bodies (40/50D) share close to the same AF system, one I've used and am quite comfortable with. I'll wait to see 1st hand how the 6D's newer AF works before deciding/buying it.
The only thing missing on the 5D2 for me is the easier built-in WiFi smartphone option (but DSLR Controller and a cable can fix that, like it does on my 50D), slightly increased FPS and reduced weight. I've rented both the 5Dc and 5D2 and they are sweet cameras. For my style of shooting the 5D2 gets the edge for LiveView and higher ISO capabilities.
Until the AF reviews come in and I get some in-hand time with the 6D it remains a very possible option, if AF is crap, it's a 5D2 for me. Unless Sony comes out with a FF NEX then I'll be doomed! I might get a NEX anyway or just chuck/sell all my film gears...so many decisions, no perfect body...this sucks