How big is your tank (more importantly, how tall is the tank)? What do you plan to keep?
T5's beat LEDs because of the incredible amount of UV light they produce. Corals seem to really benefit from it.
The spectrum you say (one blue, white, purple, pink) will look a little off. If that was my tank, i'd do a 3:1 blue to white ratio or a 2 blue, one white (higher K spectrum) and a purple.
What people don't realize is that blue bulbs do emit 'white' light, I have grown SPS under 3:1 blue/white. The trick is keeping tissue light with various ULNS methodologies. When corals have less tissue, they need less light to grow IME.
Here is my tank with a 4-bulb (3:1 blue white running VGV method)
6 bulb running zeovit (3 blue, 2 white 18k, and one fiji purple)
MH/T5 combo running zeovit (3 x blue 1 x purple)