Jason,
First off let me say congratulations on building a very clean modern looking vivarium. I like how you were able to take the exo terra light and hid the misting nozzles and tubing under it. Nice touch hiding the water reservoir in the basket. Never would of thought of that.
The thicker glass you recommend would be much better as far as a safety factor. I have found 1/32 to be a bit fragile and could easily crack.
Have you fired up the misting system? Have you had any issues with the front glass fogging? On my 55 gallon I still get some fogging immediately after misting the tank which can last for hours. The top is the only place for ventilation in my case and I built some custom screen covers to handle that. Did you give any thought to putting in a lower level air vent to allow air to flow up the front glass and out the top? If so any thoughts on how you would build this?
Building a vivarium like this really lends itself to custom designs to fit specific locations!