It really all depends on how much space you have to work with. Grow Tents can be incredibly good if you have the right space for it. Since you are saying you want 6 plants I’m guessing you know how much space you have and that a Grow Tent would probably be the best idea. I would suggest staying away from CFL since they are quite low power and you will get tiny yields from it. Much better to go with either HPS or LED, you could also use MH too. Nutrients doesn’t matter too much, there are loads of great brands, I know lots of people like FoxFarm.