After neglecting this thread I guess it is time to submit my user report. I ended up buying the Maclocks offering at the beginning of football season and have used it since then.
http://www.maclocks.com/mac-locks-macbook-pro-lock-macbook-air-lock-macbook-pro- retina-lock/macbook-pro-retina-bracket-lock.html
To start, I'm not trying to make my laptop impossible to steal, I'm just trying to make it harder to steal than the other laptops in the room. In general if I'm leaving my laptop unattended it is in a media workroom with a lot of other equipment and people coming and going. As such, having any lock on my computer makes it a harder target than the 20 or so that are not locked at all.
I'm not counting on the stadium personnel to do much in regards to theft prevention, because seriously how would they know which computer and cameras are mine. But if they see someone having to wrestle to free a locked computer I do hope they'd take notice. A large number of thefts I hear about in this environment were of equipment with no locks, allowing the thief to quickly grab it and walk away as if it was their own.
With this goal in mind the Maclooks bracket seems to be just as effective as anything else including a built-in Kensington slot. The bracket elevates the rear of the computer slightly which I don't mind for the typing angle. It also seems like it might aid in ventilation slightly.
I don't want to risk $60 to see how easy/hard it would be to break but I'm sure with enough force someone could snap the corner piece where the lock attaches. Of course anyone with a small screwdriver and enough time could just remove the bracket and leave it behind with the lock.
My concerns with the other options: I worried something like the Noble lock could damage the display if pressured the wrong way while in a laptop bag. The PNY/Griffin thing looks way too flimsy and has to be angled in between the display to attach and remove. The SnakeChicago just seems crazy and cumbersome.
All that said, I think the Maclocks bracket is the best locking option out there right now. The bracket on the bottom (vs. an adhesive pad on the back of the screen) means that any weight placed on it is spread across the bottom of the case instead of a smaller point.