I played 53's for the last 6 years. Loved them. Won't have anything bad said about them. Very, very accessible MP iron. I've recently been to a fitting and have to confirm that technology has indeed moved on. the 919's are better (for me), I've gone the FORGED route. Totally get where you are coming from and I didn't upgrade for that reason. I only would if I saw performance improvements, again (for me) I did
. Some was the move from Project X to the LZ's, efficiency went up by about 5%, that's huge...........