Currently I have a 150g 72x24x20 tank. Has nems and will be primarily sps. I have 3 175w mogul mh's with 4 48" t5ho's on it. I have a buddy who wants to trade me and I would be replacing the 3 175w mh's for 2 400w mh's. I would think this is a good idea, but would like some input, thanks.