Not quite sure what the differences to the 70 series are, but i got into a 70 series Green7 a few month's ago and, while not without some challenges adjusting from my intermediate ski, I have improved quite a bit in efficiency. The seating arrangement is very comfortable and allows for optimum balance and power equation. Whatever they changed from the 60 to the 70 series, the basic design offers a lot to the lighter paddler addicted to downwinds! So at least have a trial paddle!