Chris Wycoff, owner of Golf Etc. Hilton Head did a great test and review of some of the top iron shafts, including some that are not steel. While looking for a clear winner, it is obvious that a good clubfitting will help golfers decide not only based on the numbers on a launch monitor, but the feel of the club. Every golfer is a little different and a good clubfitting will find the right shaft for your game. Check out the review on GolfWRX here.