I have had a Black Banded Brittle Star for almost 2 years now and he has gotten HUGE! He started out the size of a golf ball with all his legs out stretched, now he is about the size of a dinner plate! For me, the brittles are the way to go. They don't munch on corals and they are a great cleaner of any left over foods. They are very hardy.
"If your wife ever asks how much something was for your tank, just tell her you got it on sale and you had to have it! She'll understand"