What happens if you want some nice primes like a 50mm 1.2? taking full advantage of that IQ? focusing with the single point and recomposing at this fine DOF will return poor focus and as the other 10 are pretty much useless.... makes the IQ worthless, unless you plan on manual focusing most of the time. How often is your subject bang in the centre?
Coming from someone who sent a 6D back and bought a 5D3 instead, I found the AF on the 6D to be decent. The center point is very good, the outer points quite usable in decent light. I tested the outers quite a bit before I sent it back due to IQ issues. Apparently mine was a dud because I'm net seeing similar IQ issues in other 6D shots. But the AF was fine...even in servo...big step forward from 5D2 imo. Sure it looks like poo on paper, but in practice the AF worked pretty good imo.
I am very interested in hearing more about peoples real world experiences with the AF system on 6D.
I used to develop b/w film from my nikon F50 myself and I was very happy with my 350D for years.
I lost my 60D due to unfortunate circumstances, and now, as I am facing the option of actually getting paid for my work, I need much more than I get from the Olympus e520 (got it for free JUST as my 60D was lost - karma is wierd:) (I am sorry about the long rant but what can you do, it's my internet as well

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I was very happy with the 60D in general, but using it alot with 50 1.4, I realized a few things I need for my work which consists of video as well as stills (events, concerts, artistic music videos, timelapse, stopmotion etc.)
(i) Better high ISO performance (especially for video)
(ii) Image stabilized zoom lens (for video) (best options seem to be 17-55 on crop, 24-105 on ff)
(iii) Better low light focus (ok if this is only on center point as it is for critical use only)
(iv) Durability (peace of mind really)
For a while I almost ahd myself convinced that a switch back to Nikon would be the thing for me - first with the release of the D800 and then again with the D600... until I held them in my hand and realized how much I like having Magic Lantern for video use (and alot of other minor differences) I am sure that for some people Nikon is the best but alas, I REALLY prefer almost every aspect of the Canons that I have tried. I am not a canon fanboy and I was really dissapointed by this as I have been looking for somethign cheaper than 5Dmk3 that still fulfills my needs but I digress.. now back to the specs

To get better high ISO performance (i), I am assuming that the 6D would be a huge upgrade over the 60D (and 7D), and on par with the 5Dmk3? (I would love the improoved video on the mk3 like clean HDMI, but I have to start at a lower price point). Also, I am wondering about moire and jello on the 6D vs 60D;5D2;5D3.
For IS (ii), it would seem that the AF-S 17-55 is really nice, but once one enters that price level, it surely would be nice with the durability and safer re-sale value of an "L" (not to mention bragging rights;)
The only Zoomrange with IS that suits me atm in L-glass seems to entail F4 which again points to FF for DoF and light gathering (F4 on crop is too big of a limitation for me)
The first 2 points easily points to canons FF line-up, and for me, the choice would have been alot more simple if I didn't have the nagging fear, that the 6D would be a downgrade in terms of AF (on some areas)
The Lowlight AF on the center (iii) sounds VERY nice as well as the tracking experience mentioned above, but I am still to find any solid information regarding general AF performance of non-center points as well as AF performance in general.
Come to think of it, I should have saved my time on this rant and started out by asking if anyone can point me towards an indepth review/user experience of the 6D?
Surely, there must be something?