Every reef tank is different and therefore the equipment necessary to run it is different. Specifically...

Phosphate reactors - Necessary in some instances but not all. You would want one if you 1) feed your tank too much 2) keep corals (mainly SPS) that require low phosphates to have brighter colors or 3) both 1 and 2. You could also use one for activated carbon but I prefer to use carbon passively (in a bag or mesh container in a high flow area of the sump). I like to use carbon passively because it means one less pump to run and maintain.

Wave makers - For a tank your size... a wise investment.

Tom