I'm using the 40 quart 1986 model. I like it because it has snapping locks. Although 1984 might be better for smaller snakes, even though it is a bit tall:
http://www.sterilite.com/Category.ht...uctCategory=35
I have my 200+ gram females in there and even a 1600 gram female in one.
The smaller girls have 3 hides, the large girl has a small kitty litter pan that is big enough that she sort of thermoregulates herself inside of it, yet still feels secure because it's so dark in there.
I'm using a Ranco thermostat and 1 foot of 11" flexwatt for each tub.