For anyone using boaphiles, I'm just wondering if you use the 421D or the 422D? Is the extra 6 inches of height really worth the extra $170 dollars? My female just reached 4 1/2 feet, so I'm starting to look for her adult cage.
Also, is a 4x2 cage large enough for a 6-7 foot boa? I'm picking up an adult male salmon next week and need to get him a larger enclosure as well, so I'd like to get a couple of boaphiles and stack them.