My dragon out grew his 20 gallon long. He was just a teeny guy (5 inches) when I first got him.
I shopped around alot, I didn't want to buy a plastic cage because I want to use a MVB eventually. I didn't want to build one, even though Shaun did. I finally found this tank and TONS of extras for $250.
Its a 75 gallon. I thought he would be so stressed from the upgrade. He was dark the last week or so and seemed down because he just didn't have much room in the old tank. When I put him in he brightened up so fast, at a bunch of salad, chowed some crickets, then jumped right up and basked for a while. He loves it and doesn't seem stressed at all.
Its kind of bare right now, but I wanted to keep it as simple as possible until he got comfortable in his new home. I am going to make a rock wall for the back, and two elevated basking spots for each side.



Here he is in his old cage. When he saw the cricket bag come out he would jump up the side, climb on my shirt and eat crickets out of my hand.

His face was in shed in that pic.
My how he has grown. This was the first couple of days I had him.