switching from t-5 to halides, need some suggestions

[Dorado13]

I initially went with t-5s over halides to save on energy costs and heat production, but I am not terribly pleased with the colors I am getting from T-5s. The t-5s also produce a healthy amount of heat and i'm really not saving that much on energy. I've decided that I want to get some deeper colors, so i'm going to switch to 2x250w halides. I don't know much about halides but I've heard good things about lumenarc III reflectors and icecap ballasts. I'd like to get some suggestions on reflectors, ballasts and bulbs. My tank is a 120g 4'x2'x2' with mostly SPS. thanks for the help.