My suggestion...
Spend the money on good lighting, 72W of PCs will do great. Let the tank seed and settle for a long time with just uncured live rock, like 2 months. Use a fine grained aragonite and do a deep sand bed. Filter is not necessary but a tiny skimmer will help. 3 small powerheads...
I would stay away from putting 2 tangs in a 75. Just keep it to the yellow tang. In my experience Flame Angels can be hard, make sure you are familiar with thier feeding needs.