I dont mean to step on toes but a taller than long cage is a common misconception.. sure height is important alot of people like the taller than long cages for display but a more lengthly cage actually is better in the respect that it gives a greater area for a gradient and thermoregulation and when they cruise the cage at night it gives them a larger area to stretch out in, typically arboreals will pick the highest perch in an enclosure .. regardless if they are comfortable or not and provideing the extra width and larger gradient will keep that from becoming an issue
A gradient can be established in a tall narrow cage but is much harder to accomplish