the 2 600's will be good for the size tent you have. 1000w will just barely cover it if you want to go that route. you'll probably need cool tubes or 1 hell of an exhaust fan to keep temps down (also depends where you live). i think (imo) that a sog harvesting once a month would get you where you want to be, it'd probably be quicker too. 2 600w hps' will be about $100 a piece if you get a rebuild kit, and the cool tubes are $90-100 a piece. the exhaust could be up to $200. get a good ph meter (if ya don't have 1)$35-$200, and some good soil ($50+ to fill a tent that size). don't worry about the filter until you are actually flowering something. if you don't have a good grow with this set up yet, don't spend the $ on expensive seeds until you can be certain you have everything you CAN control in control, i.e. temps, humidity, exhaust, ect...not sure if this is your 1st grow or not, but i'm guessing that it is or close to it. the best advice i can give in this respect is to pick a strain and go 3-4 grows with it, get comfy, and introduce other strains as your experience grows. every strain will be different and a newbie dealing with 4-5 might be a bitch when 1 plant doesn't want nutes, and another is drinking it like kool-aid.