BUILD A NEW SYSTEM NEED SOME HELP !?!?!?!

ok i just got the green light for building a closet type system i am shooting for a 6 bucket system feeding out of a rubbermaid tote i like the bucket inside a bucket plan. what type of light should i shoot for 400hps or 600hps the closet well be about 6 feet high 4 feet long" grow area and about 3 feet deep. In the grow stage i was thinking 2# what is equable to 150w each is a light holder per-plant or is mh the only way to go i want "BIG" plants so and if mh is the only way for that then so be it...what is good 250w 400w or 600w of mh for my grow area.. i also can't spend like thousands bucks i am shooting for under 800 for everything is that about right?

p.s. this is what the cfl light i was thinking of looks like
http://img256.imageshack.us/img256/1180/121bfh9.jpg