Almost forgot, Freedom Breeder makes the best racks out there if you can afford them.

As far as display racks go... great for the viewer but not the best choice for the snakes. If you want to be able to see your snakes out and about at night I would go with 20 gallon long tanks with plexiglass covers. You can make a table to house several tanks side by side, with a piece of 11" flexwatt running underneath all of them on just one thermostat. I have snakes that actually prefer this set-up to my racks!

Good luck.