My vote is also for the F7! I think it's one of the best 3 woods out there and I actually like it better than the new F8. The only reason I don't have it in my bag is because I rarely use a 3 wood now that I have the new Cobra Utility 2/3 iron.
The dual rail system makes hitting the ball so much easier than any other wood out there. It seemingly just glides across the turf without digging.
I never tried the bio cells but I would definitely recommend the F7!
Good luck!
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