Graphite shaft (irons) users: whats your favourite?

I have played Steelfibers i80 and NSPro 850GH before on the same iron head. Both almost have the same weight.
My feel in play both shaft,
Steelfibers i80 - If you paint it silver, I will think that it is a steel shaft. 
NSPro 850GH - If you cover it with some paint work, I will think that it is a graphite shaft. 
I can't really compare the dispersion of shot due to my lousy skill but I can see that on 5 iron, NSPro seem a little more difficult to control than the Steelfiber.
Price wise, I will go for NSPro lah.... So much cheaper and they don't really have much different in performance with my lousy skill.

Those with high swing speed and fast swing tempo, better to use steel shaft. If one is still young and has a fit body, he should not be afraid to try steel shaft first before settling for graphite. The result in a flight scope or trackman can tell.