I'm 64 years old and have been playing golf for almost 40 years. I carry about a 12-15 hdcp and am an inveterate club tinkerer. During my 30's and 40's I played alot of different Mizuno irons and sold my last set, MP33's, about 5 years ago. I shot my best round ever, a 76, with my MP14's in my early 40's. I want to get back to a set of those nice feeling Mizunos and after reading and reading I think something in the JPX line but not in the Tour line as I think I prefer a mid-sized head. I want to spend only $600 max on a used set. I'm a believer in Ralph Matlby's Playabiilty Index and see where he's got the JPX 919 Hot Metal pretty high but realize they are cast. If any of you are around my hdcp what do you play?