I never messed with Jack Herer due to the super long flowering time. If it takes longer than 8-9 weeks I'm not all that interested unless it's something really special like Chemdawg.
There is a strain called J1 that's very popular among my friends who grow outdoors and want to maximize yield. It's lineage is Jack Herer x Skunk #1. It's pretty common here in CA. In fact, I saw some clones of it at Harborside not 2 weeks ago. I'm guessing that it's not ideal for indoor, but it gets massive outdoors. 5-7# yields are not uncommon.