Hi Danny,
it really all depends what you want to do with it?
What I learned through the years, stay away from a polycarbonate housing, buy a solid housing to put your camera in.
I fully agree with Dave, white balance is an essential item you have to be able to control. Check housings from Gates, Amphibico and Light and Motion and camera models mode for these housings. I wouldn't trust any other company to put my camera in. Let us know what you have in mind.
best regards, Klemens