User 105
Journeyman Pro
The only person who can decide is yourself. In my opinion the S56 is a sexy looking little number. Their is absolutely no harm in going to an authorised Ping fitter now and getting C/F for the Pings.
As Ethan said earlier, getting the correct shaft is a huge factor in the c/f process.
From the belfry fitting they have recomended a Stiff NS Pro shaft. although it didn't say which series. My swing speed with my 6i is 89-90 mph. Which is comfortably in the stiff region.
Once (if) I decided on the s56's I will go and get CF for that club.