Sonographe SG-3 Jelco Arm- Cartridge Upgrade

Hi All,

I have a pre-Conrad Johnson Sonographe SG-3 with Jelco 250ST and for now, an AT-VM95E. The cartridge is new and just for now. I will be adding a second turntable to the mix of much higher quality however the SG-3 is fully suspended and the Jelco is not a bad tonearm so I am wondering since I am purchasing an approximately $1k cartridge for the new table that I can use on this table, Is it worth it to swap out the Jelco arm for a significantly better arm (say a Jelco 750) knowing that a new turntable will use the cartridge as well as the arm so it's not a dedicated purchase.

Balance of the system is....

Krell Resolution 1

Maggie 1.7's

PSB Gold I's

Pass Labs X350.5

SPL Electros Preamp

Krell KSL Preamp

Luxman C-02 Preamp

Paragon System E tube preamp

Pro-Ject tube phono preamp

Denon DCD S-10

Still learning about what I can do with respect to what I am looking for in vinyl so fully balanced seems a good option for the new table, not a lot of fully balanced phono preamps out there but there are some good choices available. Not saying I am going fully balanced it's just that I do enjoy that dead quiet :)