Adding more MHs

[coldincanada]

I currently have a 72 gal sps/clam tank with one 400W 65K and 3 110W VHO Actinics. I also have an old double 175W MH setup from a previous system that I am not currently using. I was thinking of adding them to my current system as well but I'm not sure about which bulbs to run. Even with the 3 VHO's I'm running I still find the tank looks a little yellow, so I am leaning toward higher K bulbs. My question is which ones do I get? I'm thinking 12k or 14k. Also what about the manufacturer Ushio, starburst, german or what? Is one better than the other? Does anyone have any experience with these bulbs?
Thanks,

cic