913 drivers

By all accounts the new 913 drivers sound like they will be great and i am keen to try one out.

I am a 15 h/capper that on occasions suffer from a bit of a slice.  I have always been fitted with a stiff shaft (currently using G20 with the stock s shaft).  I expect the 913D2 head will be most suitable, but what shaft is likely to be best, given i hope to reduce side spin and am seeking a mid height trajectory

The right shaft for you will depend on a lot of different factors.  How you swing the club, how you load the shaft during the swing, your club head speed and the tempo of your swing all play a factor in what will work for you and what may not. The best way to really find the right shaft for you is to get fitted.  

Exactly! ^^^ GET FITTED!