I would suggest the GO box man, first off it has EVERY thing you need for a rotation and it has EVERYTHING your plants need for a rotation. And its organic you cant beat it man.
Foxs farm is good but good to start with you get good quality, but personal opinion if the plants were grown the same with both nutes, i bet the GO nuted plants would be more potent and tastier, where as you might get a better yield of less potnet not a good tasting weed with fox farm. id still say there yield is similar mostly taste and potnecy really! Not to say it wont be bomb though!