Amused, for your tank size, you can prob keep 3-4 tangs.. as long as you don't get too big specimen. Sohal may be too big for you. Tangs are suspectible to ich.. can;t help it most of the time. You do need to plan carefully what you intend to keep and add the most aggressive fish last.
Anthias are good choice for schooling fishes.. so are chromis (but chromis usually not as nice but cheap. Also very greedy and will eat all your food before it reaches others.).
As Iggy has mentioned, you can go CF or LCK for fishes... if you going other places.. can check with desi. We going Pasir Ris later, prob around noon.