Metal Halide Lights

[pgfraser]

Hello All,
I'm considering purchasing a metal halide light fixture for my reef tank and was wondering if anybody has any recommendation of a fixture and an appropriate size of fixture for my tank. It is 90 gal and is 18"Lx48"Wx25"H. Looking for something with mostly soft corals with potentially a few hard ones not overly intense of a fixture but sufficient. Thanks!!