Save the fish for when everything has levelled out without water changes,usually around the 6 week mark.
Seems like the perfect time to add some snails, brittle stars and other CUC members to let them take hold.
Some zoa's, mushies, leather, xenia or star polyps would also most likely do well and add a lot of interest to the tank, whilst helping with some of the nutrients and will probably bring in a pod or three with them.
Avoid any LPS for the moment, just because a coral is cheap doesnt mean it didn't take years to grow on the reef and deserves to be treated with any less respect.
Perhaps hit Pete up at oceanarium for some nice tank hardy corals?
http://www.oceanarium.com.au/products.toy