Hello fishman, welcome to the chameleon forums
From the few chameleon species I have kept, I would have to say the Veiled chameleon is more forgiving. However, keeping a chameleon is not easy. They are expensive and require daily care and monitoring.
A good place to do some research is the Chameleon News
website. There are good articles on chameleon husbandry and the costs of keeping a chameleon.
Some cage plans can be found here: chameleon cage plans