Canon SL1 vs. Sony Nex-6 or something else???

I can't make up my mind. Please help. I'm asking this in the Canon forum because I'm leaning toward the Sony at this point for reasons stated below. My purpose for getting a camera is to shoot our 18 month old son in everyday life and also for headshots (he does commercial work believe it or not). My wife and I are looking for a camera that meets these criteria which I've listed in order of importance:

1) Fast Autofocus. This is #1 priority for sure.

2) Shallow DoF. Rules out smaller sensor cameras.

3) Low light performance.

4) Relatively compact.

5) Hopefully around or under $800 (I get a 25% discount on Sony Cameras)

I work as a videographer so I'm somewhat knowledgable of cameras BUT this will be my first "real" camera purchase for photos beyond the Canon S90 we got a few years back. Unfortunately the S90's AF isn't nearly fast enough at all and we want better low light performance and shallower DoF so we're going larger sensor.

We don't have any lenses and realistically our budget right now doesn't allow for some of the awesome lenses that Canon has so I was almost dead set on getting the Sony NEX-6 until I picked up the little Canon SL1 the other day and messed around with it for a minute. I suddenly realized the power of the Optical Viewfinder and it's near instant AF. That is EXACTLY what we want! Granted the SL1's LCD live view display is MUCH slower for AF than the Sony. The Sony's AF is ALMOST as fast as Canon's OVF...but not quite. And that is our most important criteria so now I'm totally confused.

REASONS TO GET SONY NEX-6: Well, here's the thing...the Sony was a bit slower in AF in my limited testing but much better/faster than Canon when using the LCD screen and it also has an articulating screen, has wifi capability which I'm sure will be improved over time (it's a bit slow and awkward at the moment), is more compact than the SL1, shoots 1080p60 video (which means that it could be a backup cam if I was in a total bind one of my regular cams went down for some crazy reason (that's the film speed we shoot at usually))...and then finally, here's the kicker...a family member of ours works for Sony so I'd essentially get 25% off making the NEX-6 much less than the SL1.

Now you can see how I'm leaning toward Sony.

REASONS TO GET CANON SL1: Our #1 Priority is AF speed and the Optical Viewfinder was SUPER fast in my limited testing. Practically instant. Since it's my #1 priority I'm now totally unsure of which to go with (given that Sony has all those other advantages mentioned above).

I don't want to spend more than the either camera and we are trying to keep things to a small(er) size (rules out t4i/t5i, etc) while still keeping the larger sensor for that shallow DoF.

Any one have experience with both of these cameras and would like to weigh in on their thoughts?