You are on the right tract, you are doing the research brfore the cham. I would go on the internet and look up several odf the smaller chameleons, look at the pictures and the needs of each and go from there. Also I just ordered " The Chameleon Handbook" by Francois Le Berre (get the second edition) It has lots of pictures of lot of types of chamemeons. it will also gice you the bacis needs for the different type. I order it off amazon and it wasn't expensive. Best of luck. Let us know what you decide.
The carpets can be really colourful; in fact I think they are one of the most beautiful. I thought my rudis were kind of boring; one being bright green, the other being moss green, but the patterns they come up with are amazing. In fact the "boring" moss green one is fascinating, in that everytime we go past the enclosure we don't know what colours she will be displaying. I'm sure you will enjoy whatever you choose.