My new mono set up is still a work in progress. I have the cartridges: Ortofon Quintet Mono and Audio Technica AT-33MONO. They are new in a box. What I don't have yet is the tonearm. I just bought a Nottingham Analogue Space 294 with the 12" Ace-Space arm and will be adding an Ortofon RS-309D 12" arm as soon as my wallet can recover a little from the turntable purchase.
Prior to this set up I had a Garrard 401 in a custom made plinth, with a Jelco 12" arm and Ortofon SPU mono cartridge. I loved that rig for all of my 50s mono LPs. It will be interesting to see how the AT-33MONO compares on the Nottingham table. I bought the Ortofon Quintet mono for newer mono reissue pressings.
--Jerome