I think Bao made the correct determination for a full sps reef given the dimensions. the sunpower's length is 58.5" and your tank is the 59.5". The light is 17.5' wide and the tank is 22.5".This will give complete coverage of the tank. You could get away with the 4ft sunpower on the tank however you would have some diming around the edges and wouldnt be able to aquascape to the edge of the tank with sps which seems like a waste to me.
The hybrid is a wonderful light that gives amazing color and coral growth. Its the nicest combination light Ive seen in person. If I had a beautiful tank like yours I would definitely want the hyrbid over the sunpower however it all depends on budget.