Make sure to get the black hinges, radiant heat panel, and the Ranco thermostat - you will really like it. It's light, sturdy, attractive, stackable, reasonably priced, and holds temps/humidity rock steady. If you want to spoil a pet snake, this is the way to do it.
The only (minor) downside: I got the flourescent light installed, and it burnt out within a couple weeks. If Jeff would toss in a low-heat LED light the cages would be completely perfect.