it might be too large (even with the divider) and humidity issues are always prevalent with glass enclosures, but have you considered a pair of Rhacodactylus leachianus? I'm sold on these animals as soon as I afford to provide a proper habitat.
other than that, if you can get the temperatures correct, I've been reading a fair amount about blue tonged skinks and how they're remarkably rewarding animals to keep. if I had the space and the time I'd have both species in my collection.