i have finally saved up enough to upgrade my lighting to some halides, as im ready to try my hands at sps. i have pretty much decided (unless anyone has better ideas) to get my lighting from aquariumlight.com. now heres my question, i want to be able to keep most any corals, especially acros. i have decided to go with a MH/VHO combo, but here comes my questions. should i go with dual 250 mh's or 175's? then the vhos are 110w's and come either duals or quads. which combonation of these 2 should i go with? i wanna get it right, and i would hate to wish i had bought something else later on.as far as kelvin, i'm leaning towards a 13k or 14k mh bulb. so what do u guys think? the tank is ur standard 48"x18"x20" 75g