Looks like there is some other polys that seem to have lower friction and stiffness than MSV CoF 17.
I would truly be interested to hear about the comparisions. I'm not willing to do the expensive tests myself. I am perfectly happy with the vsTouch 1.30 / Cof17 hybrid at 57/53.
The big question to us who pays their stringing is the durability. And more precisely the question "how the poly ages?". This is where CoF really shines.
Born 1978. Male 4.5 50/50 competetive/recreational player. Gut/poly.