If you want sheer potency, IMO you should go with something from Subcool. I had some Danny Boy that went 60 days and it was FAR AND AWAY more potent than anything else.
If you find the right pheno of Jack Herer you can get a fruity, heavy yielding, hard hitting plant.
Why don't you give a brief description of your grow environment and grow skill, those things will have more effect on your finished product than what strain you choose.
The original Green Crack cut....................not one of the many bitch versions of it floating around. The original is done at 46-48 days. Grown it many times..................
Ive been growing blue dream (50-55 days) and gods gift (50 days) for about a year now. both yield good and have great flavor, potency, and bag appeal. but i also use bush master which knocks at least a week of of my flowering time.
what blue dream is done at 50? The one Ive run is best 60+