I like the True Temper steels. Very responsive shaft that allows you to immediately know how your swing was. If you hit a good shot, you know it. If you hit a bad shot, you it but aren't spending the next 5-10 minutes wondering why.
A large percentage of tour pro's are playing Royal Percision Rifle shafts. They have different types of shafts. I just ordered a set of tour flighted shafts that have low kick pts. in 2-4 iron to hit it higher, Mid kick pts. 5-7 iron, and high kick pts 8-w to hit it lower and more controlled. Rich