I seriously considered buying from Reptile Basics, but there were two things that made me decide not to. Back heat rather than belly heat and 4 high rather than 5 high.
I'll be ordering my rack, with the divider options from the guy at HerpEnclosures that Vaughn recommended. A 5 high rack with belly heat and the optional dividers that can house 10 snakes up to about 800-1000 grams. By this summer I can order another one and start moving snakes into bigger "digs".
I am, however, purchasing my Helix from Reptile Basics. In fact, just placed the order for it yesterday. Rich is a great guy!