I have been checking out Martin's Cages and I have decided to purchase a cage. I am having some trouble deciding a cage for them though... I am looking at the R-640, R-660, R-670, and possibly the R-680. I want a cage they can live in comfortably, and I want to have adequate room for a wheel (possibly two as they have sharing issues at times :twisted: ), bowl, hiding spot, water, etc. without too much crowding. Feel free to post any experience with these cages, suggestions, etc. Thanks!