Beginner arboreal snake species ?

I'm thinking about getting an arboreal species come a few months, and am starting my preparation for the little beasty. My first two thoughts are Corallus Hortulanus and Morelia Virdis, but I've also been thinking about carpets and some colubrids with arboreal tenancies. What are some other options on the table ?

Green tree python or Amazon tree boa are fairly easy to care for. Carpet pythons, bci's and retics can have arboreal tendencies too. It all depends on how you setup the tank. :)