[Petite]

If she's not particularly interested in wheels, have you thought of trying a flying saucer?

As far as cages are concerned, a Detolf should be fine, and I don't think you would gain much by getting a new branded one. I'm assuming you have a lid on it, so as she likes to climb perhaps you could experiment be creating a network of higher things for her to explore - maybe a sputnik, and some long bendy bridges or whatever else you think she might enjoy.