I just did a fitting at my local PGA Superstore - and the best performing irons for me were the AP2s with Project X LZ 5.5 shafts. I currently have Dynamic Gold SL R300 shafts in my current irons (miz).
I know the PX LZs are now stock shafts - but had to be custom ordered because they are not in stock. However, I did not try any KBS shafts during the fitting. Does anyone recommend a KBS shaft to try out as well in a similar weight (100-115g) before looking into ordering the AP2s?