Julian's advice is dead on. For a tank that size I think 4x54 watt is needed to supply sufficient lighting for a typical array of corals. If you want a lot of SPS or other high light corals then I would recommend 6x54. I'd stay away from the red bulb and probably run a mix of aquablue (which is 11K spectrum) and actinics.
Julian's right that icecaps are the best, but they seem to command a premium price for their brand name. I find that Tek parabolic reflectors are a close second at a cheaper price.