Lighting a 70G Cube

[AugustWest]

Getting ready to order lights for 30'x30"x18"H Cube. Considering an ATI Sunpower 6x24w OR 8x24w?

Going to be SPS dominant with LPS down low in the tank. Any suggestions?
I'm also considering an Aquamedic Ocean light 1x250W MH x 2x24W T5....

Thanks