For excellent root development, structure and disease resistence I recommend voodoo juice. You could also run piranha alongside this with a little carboload (just once on the carb's) to feed the friendly bacteria. Also silicon to help cell structure. I just use cheap nutes apart from the above. Basically anything high in nitrogen and low in phosphorous and high in potassium is good for veg.
In flower I like to use sensi bloom part a and b, alongside carboload, with a little liquid oxygen.