id probibly go with the canna series, i believe they are organic too

most the companys are about the same in my eyes, all about the same price except for AN. you will beable to have more control with a 3 part system but a 2 part system will be easy. its really up to you in what looks the most apealing to you.

me personally would build a rich organic soil and use a compost tea to feed my ladies