I'm down to two BB30/PF30/OSBB cranksets. The S-Works with Praxis Ring, Cannondale SISL2 OPI Spider ring or Cannondale SISL2 with 110 spider Praxis rings. Availability SISL2 Mid Feb, S-Works March.

The S-Works specs are impressive and specs. Plus specialized sells a quarq spider. Specialized FACT: Whitepaper: Testing.

I "eventually" want to put the same crank on two bikes CAAD10 and Tarmac OSBB. I'm really on the fence...

Anyone use the S-works or SISL2 cranksets?