Ok, so, most of the corals posted here are very easy and very pretty, but I must caution you to be careful and select pretty specimens. Once you get your feet wet, and get all adjusted/set in what you're doing, some of these species can really take over! Like the GSP! Just be prepared to frag or move colonies to their own "island."
That, and don't freak out if your first colony tanks it and melts down. Some corals can come back after a melt down, like most Xenias.