Need help with diy for 24x24x19 tank

[dans85]

I'm planning out a diy fixture for my new 45g cube, and I'm needing a bit of help. As of right now I am planning on using a makers 12" heatsink with 14 RB, 7 NW, 4 TV , and 4 OCW leds. My concern is being able to have good spread over the tank while maintaining PAR for SPS coral. Anyone have any advice as far as led count, or optics? This is my first diy build for something this big.