In light of me wanting to purchase one of these fridges, I ended up getting a 7cu ft. MagicChef
freezer from Home Depot. They have a sale on them right now, so it is only $158. I like the growth I will have with a keezer, so I opted to spend a little extra money.
Here are some pics of the freezer. It will hold three corny kegs easily, and the CO2 will fit on the hump if it's a 5lb. I got a 10lb CO2 tank though, so I will be making a collar for my keezer.
Not to take away from the op, but this is my build that I decided on after doing more research.
7cu ft. keezer $158
19cu ft. fermentation freezer $150 (used on craigslist)
Ranco Temp Controller $80
I'm going to use the Ranco for the ferment chamber, and I will modify the internal thermostat for the keezer so that it stays above freezing. I don't need precision for the keezer like I will for the ferment chamber, so I only bought one temp controller to save on costs.