IV was a great cartridge but the V/MR was better back then. I have never been happy with non OEM replacements so I got rid of all my Shures and Stantons, and after some help from friends discovered Dynavector 20 series and XX series, I have always preferred the sound of MC, though back in the 70's and 80's the V-15's and 881's did track significantly better than the Ortofon MC's. I never went back to Ortofon, though they track very well now days. They make some great MM cartridges now days. The MM Black is one I would choose if I were going back to MM cartridges. The Bronze is to bright and lacks bass below 70 HZ or so. If cartridges don't do the bottom three octaves correctly I have no interest in them.