go with the 9sf and if not too late go with a 1000w you will get much more light penetration. also look into scrog"s. you lay a screen over your garden when branches come through the screen you start manipulaing them along the screen by tying them down. everything below the screen is cut away. when you get half to three fourths full start flowering allowing for some stretch. the premise here is to create a screen full of top buds thereby increasing overall yield. fox farms is a very good product whether its soil or nutients. sunleaves guano is very very cost effective and can be added to your water just like liquid fertilizer. alaska is another low priced quality product. check out otooles nursery for best prices. if you get half gram per watt your doing really good. that really denpends on strain and getting your grow dialed in. each one will get better. use the above nutrients and you'll run little risk of burning you plants. good luck

meded so you can mededicate to mededitate