I wouldn't recommend putting any lizards in an acrylic tank. They will scratch the crap out of it with their nails. I also woudln't recommend a tree boa/python unless you have experience working with boas/pythons. These are for experienced keepers. Although I'm partial to snakes myself, I like Dozers suggestion of a nicely planted amphibian setup
How much work are you willing to put into maintaining a setup? Are you looking for animals that you can handle? We could probably give you some better suggestions with a few more specifics.