I would go with a captive raised clone of RBTA. It's eco friendly and is likely to split until that tank is full of them. Not bad for a one time purchase.
Oh and it is more likely to live than most of it's counterparts.
Personally I would get a clown that is difficult to find, like a leuc, an McCulloch's, or a latz since you will only be housing one type. The other option is something that you can have several of, such as a harem of captive raised percs with a pair of picassos or a group of nigripes.
FIRST THINGS FIRST...... You've got to put sponge filters or some other kind of anemone guard over every one of those powerhead intakes. Wherever they end up, you should not move them once set as this will promote the settling in of the nem(s). They tend to move once you start messing with their circulation and lighting.