Definately critters first.
Also, I'd save the tomatoe clown for a while and make him one of the latter fishes you add, because they can be a bit on the aggressive side.
Also, if you are going to try to nest him in an anemone, I'd recommend you put the anemone in before you the clown so it'll be there when/if he decides to nest. And you don't want an anemone in the tank until it has been stabalized for at least 6 months.
--Me