Well, it really depends on your environment. I keep my house chilly and live in a cold place and so I like racks that have walls and floor and lid. I have 4 racks from Reptile Basics and love them: http://www.reptilebasics.com/Iris-Sw...t-p-16197.html.
For younger snakes, or less secure snakes, I use the tub dividers![]()