Rather than simply randomly throwing a bunch of suggested corals in the tank, and then deciding down the road that you really wished you hadn't done that and you wished that you would have added this or that coral, I recommend that you spend some time doing some research into exactly what type of reef you want down the road. If you want a mixed reef, than a random hog podge of different corals is ok. If you want a softie tank than many of those suggested will be ok also. If you want an SPS dominated tank, I wouldn't add most of those that have been recommended; instead I would start with some of the hardier sps, like birdsnest and monti caps. But again, you need to do some research. If you throw monti caps onto the top of your reef, eventually they are going to expand and shadow out much of the lower regions.
Additionally, there is the question of fish, what fish are you looking at or thinking about adding down the road? If you want tangs or angel fish then spending a bunch of money on zoas is silly, because these fish think they are a tasty treat.
John's suggestion on adding some of the corals and keeping them isolated is an excellent suggestion. I personally have kept colt corals, GSP, mushrooms and xenia in this manner. When they overgrow I trim em off and either give them to somebody getting into the hobby who wants them or visit my LFS for some local credit.
Anywho, some additional info on the direction you plan on going would be good in order to insure that you get the right advice. Just my $.02 worth