Assuming the results hold true, my clear choices seem to be shoot at 70# with 68'#s of ke, or 62# with 63'#s of ke. 62#s is looking pretty sweet right now... Plenty of ke, almost identical tragectory out to the distances I'll shoot and so easy to draw it's comical.
Sounds like a no-brainer to me! If I would have made that choice years ago I wouldn't be forced to shoot lower poundage setups now.