Looking good man I see you're running smart pots good choice heard good things about then watch out for mildew though sometime it can build up in these pots good thing is it's unlikely to spread to the plant, though it's always good to be cautious. About pot size I find 3 gallons is good to go with unless you're growing some monster photos with months of veg then you should never need more than that and your plants will be blessed with bountiful harvest

happy growing dude