You will probably get some very varied answers on those three nutes. Personally I've only dabbled here and there with Dynagrow, could never commit to it myself. I've only done one round in coco with GO when it first came out. Did ok but I didn't go back. I do use it to suplement with some organics or in teas. I use their fish more than anything else.
Personally I really like
H16 in coco. I've tried a lot of things out there and it works well for me but I've taken the time to get it dialed. Out of those 3 you listed it's a no brainer as far as I'm concerned but it really depends on what you're looking for. Honestly though, I never really took the time to seriously dial
General Organics.