upgrading but cant decide a little help

ok i been grown mj indoors for about 6 months i got a veg cab wit cfl to do 5-10 plants for veg and 2 150 hps for flowering im doin this in my closet but i want to upgrade to take advantage of full use of the space i got....i got it framed in one corner right now 2X3 but its is really 2.5 feet deep 5 feet wide 5 feet high...for flower i don't know if i want a 600w hps with a dimmable ballast or a 1000w hps wit a dimmable ballast.....i am growing using sea of green and organic whinch would be the best choice i dont want to spend money on the 600w then want the 1000w because i am not satisfied... any feed back would be awsome.... o an above that i am making a new veg area that is 2.5 x 5 feet wide 3 feet high......

Ok not the best grower but go with what you can afford....lol and rember 1000 hps is going to run hotter temp than 600 so if you can keep the 1000 cool should be good...Just my thoughts only

i appreciate ...u know what size exhaust n intake fan i need to use for a 1000w what and i am getting one with a dimmable ballast i can run it at 50%, 75% or 100% so if i run it at 50% thats 500w n i can turn it up ass needed for budding to get all the use out the space i have..well that is what i am thinking

I know a sea of green guy who uses the 1000 dimmable. but he says he never runs it all the way but has it if needed. I think if you do not see your self having a larger area then you speculate now dont waste the doe on bigger bulb or cost of larger lamp start up cost. If you see your self going Large like 5x8 room in the future then step. Because of the dimmer you are not convinced because of elec charge. But if on full blast and 3 feet away?

ok i feel you ya i do plan on having a bigger space than 2.5x5x5.5 i just want have the option i guess to have more light....what size is good for this space