If the clowns aren't wild it takes them a while to figure out what an anemone is and that they can live in them...
that being said, i tend to agree with the rest that you should try to provide your livestock with an environment where they could thrive for as long as you have them.... if you got bore this quick with an anemone (swaying, elegant, moving creature) it may take you the trip from your LFS to the acclimation bucket for you to get bore of the clam, that is if you acclimate.
A damsels only tank may suit you best! they come in all colors and chase the heck out of each other all day long, they kill the weak (so that will satisfy your need of seeing if its going to make it) and they are cheap so when they die it only $6 bucks.