Originally Posted by clubchamp
Easiest way to tell is to take your current clubs and see if the distances matches up. I don't put a lot of faith in the distance numbers on a launch monitor but they are a good tool to use.
This is the starting point.
Launch monitors need to be properly calibrated and not "juiced up" to give the best info (distance is only one data point). Also, the monitor tech needs to know how to translate data points into possible head/shaft combinations (tech needs training, and enough customer sessions a week to build up skills).
Strangely, the monitor at our local Golf Galaxy is a bit conservative. I average about about 6 yards longer with irons and up to 15 longer with woods in the wild than I get on the launch monitor. The GG guys say distance is only one of the factors which the launch monitor measures.