Potential Sound Quality From 1950’s Microgroove


Hi All,
I’ve been modifying a Thorens TD 145 MK 1. After I built and installed a three inch hard maple plinth, the tonearm lift went kaput. I then upgraded the tonearm cable, upgraded the TP 16 tonearm headshell, a Herbies Way Excellent record mat, Herbies tenderfeet, dampened the insides and loaded a Audio Technica 33 Mono Anniversary Cartridge. I’m using an ASR Mini Basis Exclusive MK 2 Phono Amp.
So at least 97% of my record collection is 1950’s mono microgroove vinyl. I’ve been thinking about upgrading my tonearm. I’d most likely purchase a Sorane TA 1and then would eventually hope to upgrade my mono cartridge at a later date. But would I benefit, when the records I’m playing are nearly ancient with respect to their sound quality? Remastered mono vinyl is a consideration but those are limited in number when compared to stereo reissues. Any thoughts are appreciated.
goofyfoot
From what I hear, Jelco is no more and I can get the Sorane for what the Jelco would cost me. Jelco made Mission tonearms and Thorens owners liked them a lot. Also, SME would be a solid choice but their prices are too high. Of course, then there is the matter of installing it.
The Triplanar is one of the easiest tonearms to mount and runs circles around the SME IMO. Not cheap though, but its so easy on the vinyl! I paid way more for my records....
I think improvement for mono can be achieved, but subtle.

LP's with grooves compatible for advanced stylus shape would benefit from change from spherical or elliptical. Most flexible would be a MM mono body with various stylus options you can swap into the cartridge for a specific lp, I may go there myself.

I would coincidentally think more about what would improve your stereo lps, small qty existing, and future. 

that might lead you to consider a longer arm, changeable headshell, two arm deck

ease of VTA adjustment might be a consideration when choosing an arm
In my current state, most higher end options are cost prohibitive. The Sorane would be about $1,500.00.