Very nice set-up, but it is indeed tall. I like the driftwood you have already, but you can get some nice tall peices that would look very nice, and give him plenty to climb on. That is all I can suggest really if you prefer not to switch to a smaller tank (its totally up to you) Don't forget that if you do put him in a smaller enclosure, you can use that one once he is a little bigger.

On another note, where are you hiding your humidity/thermometer gauges?