Those T12s are beautiful, and look great for these guys, as I understand it isn't unusual for them to enjoy a bit of a climb. I'm also looking at a T12 as the final home for my Jungle Carpet Python, though for now a 3x2x2 is more than enough for him.

I've got my little ones (they're 9 months old) in 2' enclosures for now, but they'll bump up to 3x2x2 next year. We'll see what they ultimately need, but the T12 looks like a great option.