Fremer's new reference is a Kuzma 4-point which has a removable headshell. I don't think having a removable headshell is a big deal. I would not use it for running multiple cartridges due to the reasons mentioned by others. Plus I would have separate phono-stages optimized for each cartridge, which would mean unplugging and plugging cables. But it does make initial cartridge setup so much easier. I'm more comfortable stitching up people after being up for 24 hours than I am setting up a cartridge with a full night's sleep
A removable armward like JMW or Graham is ok with me.
John I would keep whatever tonearm you are using with your Horizon. I would upgrade the entire turntable to a Spacedeck, Hyperspace or 294 before the tonearm. All of those will yield nice improvements.
John I would keep whatever tonearm you are using with your Horizon. I would upgrade the entire turntable to a Spacedeck, Hyperspace or 294 before the tonearm. All of those will yield nice improvements.