Hi Everyone, could you give me some input on my rack choice?

Let me describe what I am looking for in a rack:

1) I have 4 (soon to be 8) small BP's so I need something around a sweaterbox size for them to grow into and, for the females, eventually out of.
2) I want Flexwatt belly heat, and because I'm in Iowa I want 4" rather than 3".
3) I want the IRIS tubs for the visibility.
4) I would rather buy than build my own.
5) I don't want an open sided economy rack.

This puts me at this model from Rich at Reptile basics. The 32 quart Iris sweater box. The only PROBLEM is that it has 3" of Flexwatt rather than 4". I'm still waiting to hear back if he can do 4" but it will probably cost something extra.

http://www.reptilebasics.com/Iris-Sw...t-p-16197.html

OR Animal Plastics (right here in Iowa) has one the IRIS 375 that is slightly smaller than sweaterbox size. Sweaterbox is usually about 22 by 18 by 6, I think, and this one is more like 22 by 14 by 6. So the problem with this one is that I think it might be too small to waste my time on it?? On the plus side, it comes standard with 4" flexwatt.

So what do you think:

A) Try and get 4" Flexwatt installed from Rich
B) Settle for a slightly smaller tub from animalplastics.com
C) Keep looking? (Any suggestions?)

Thanks so much!

JonV