Joong Sun P.  I don't think going from d+ white to ahina is a great idea.  The white is a high flex point, low torque, lower launching shaft that will generate a lower launch and spin than the ahina.  The Ahina will launch higher, spin more and has higher torque.  If you are looking to duplicate feel, I would personally get the same shaft, rather than changing shafts.

Thanks Clifford. 

Sure, as you recommended buying 913d2 with d+ white 72 is the first option. But it seems to me that 913 d2 is out of my budget so I started to look for alternatives. In terms of head 913 and 910 are pretty similar, but 910 doesn't have d+ white as a stock option. If you think ahnia is quite different from d+ white, what kind of stock shaft do you recommend?

Joong