I would like to place my vote for a lion fish, though it would no doubt be difficult to acheive with all those flowing fins.
A Majestic angel would also be good and I`m looking forward to the arrival of the banded shrimp.
If you ever have realistic anemones, then the clownfish could hang around it as in real life.
I`m also looking forward to being able to feed them.
I used to keep tropical marines but can`t now through lack of space (I live on a boat now) so this program is the closest I can get to my old hobby - Thanks