I use and like ARS (www.arscaging.com). You cant go wrong with Freedon Breeder though. Both ARS and FB sell a 10 high CB70 rack that comes with heat and tubs for around $1000 plus shipping.

http://www.arscaging.com/htm/models_ARS7010.html

http://freedombreeder.com/cage.php?cageID=23