It's getting close to cage upgrade time for Vicky and I got a new dilemma. I've pretty much narrowed it down to either an AP T-10 with a shelf which is 48x24x15 PVC for $280 delivered. My other option is a Constrictors NW 60x24x16 HDPE cage with no shelf for $415 delivered. My question is which would be actual room for my girls? I know the shelf adds room but is it enough to offset a whole extra foot in length and 24 inches in depth? Also there is the price difference of course.