Cartridge for Technics SL-1200G or SL-1200GR


I've been using a Technics SL-1600MK2 since about 1982.  I'm currently using an Ortofon Blue cartridge.  I have a NAD M12 pre, M22 v2 PA, and Tannoy 8 dcti speakers.

I plan to upgrade to a 1200G or 1200GR and wanted some cartridge recommendations from current owners.  I've considered the Ortofon Black for either, but I'm not sure if that would be overkill for the 1200GR. The Blue sounds pretty good with my current setup, so how much improvement could I expect if I went with the Black.  
128x128oldschool1948
@oldschool1948 
I use a Hana SL MC on my 1200G with excellent results. I have an extra headshell and occasionally switch to my Shure v-mr with a Jico SAS stylus. It's all good.  
ericsch - thanks for the recommendation.

Quick Google search provided a Hana SL MC and Ortofon Quintet-Black-S-MC comparison:  https://www.analogplanet.com/content/hana-sl-mc-750-versus-ortofon-quintet-black-s-mc-999

Interesting read.  I realize that I have a lot more to learn about turntables and cartridges.
Almost impossible to find, the Signet TK7SU remains the favorite MM cartridge in my collection. 

If you stumble across one, grab it.