I use vision cages for my uromastyx and my tegu. My tegu is about 3.5 ft. and he's in a 6 x 3 x 2. He gets plenty of free roam time and a soak every week and seems pretty comfortable in it. I mist 2-3 times a week to keep the humidity and plan on building him a bigger cage in the future once I'm settled in at my own pad.
I went with the visions because I'm a student and I've moved around during the past couple of years from apartment to apartment. They are pretty light and the moving I was able to do myself. here's a pic.
Tristan

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Tristan
1.1 Blood Pythons (Rambo and Medussa) 
1.2 Egyptian Uromastyx (Dog, Cleo, Slo Mo) 
0.1 Suriname Red Tail Boas (Stoney)
1.0 Argentine Black and White Tegu (Roy)