I had the 50D for a while, loved it.. But it had 9 cross type AF points..
I sold my 5Dc for the only reason: lacking AF accuracy on the outer points. It drove me mad.. Bought a 7D, but actually I don't really love the digital feel the pictures have.. Coming from a 5Dc I'm really spoiled I guess.. I just can't love the pictures it produces. So I'm trading it for either a 6D or 5DIII.
But the opinions are different in this topic, from the 5DIII topic.. Thats what confusing, so I know it has been asked 2000 times... But the answers aren't quite consistent.
well, it's certainly on the level of the 5Dc (which I dont have major issues with).
You gotta remember that you're not exactly comparing apples to apples either, the crop factor is VERY forgiving with much wider DOF. FF dont mess around in that regard. I feel the 6D is considerably more accurate and faster than the 5Dc, but that's my personal feeling on the matter. I have no way of proving it, but I do shoot both regularly.