Well related to nutrients i'll use TaNg's AN feeding schedule.
If I can sqweez some gold ill buy b2x3 if not Ill stick to b2x2 for now. Since it will be my first grow, I guess I can test with it a little.
Good choice, stick with the B2x2 and use the extra cash to get a red cfl to stick in later on for flowering. You'll be able to use both next grow along with your shiny new GN unit