I am a huge fan of my 52, 56 and 60 degree SM4's and am trying to decide whether or not I want to upgrade to the SM5's.  Does anyone have any experience with the switch and, if so, have you noticed any significant difference? I am a good short game player and am able to stop/spin my SM4's so it isn't a performance concern.   I might skip this model and wait for the new ones when they are released.  Any thoughts?
Greg