Good to see BM is getting the props it deserves!! IMO it has the best bang for the buck it's better than average in performance, durability, comfort, spin, and price. I've yet to try the 17g as I was using a 16x19 when I first tried BM and wanted to go with a thicker gauge string. I've since switched back to 18x20. My preferred gauge in 18x20 was 17g. I felt I was able to generate a little more spin with a 17g.
Head Graphene Speed Pro 18x20