I had a VPI Aries with the same tonearm, I think you are likely to not find anything comparable to what you have table and arm wise for your budget so I’d say keep them
I think a new cartridge is a great idea. Buying used is a bit of a mixed bag , you never know what you’re going to get or if the reported play hours are accurate or not. Not worth it unless it’s a great deal. The suggestion of the Hana SL is a good choice. I had the original one, not the Mark 2. It was great value for the $ and worked well on the JMW 9 arm.
I eventually upgraded it to one of the Benz Wood Micro SM cartridge that I liked way more. 6 months into ownership, the suspension collapsed. Got it replaced under warranty and that was it.
I wouldn’t be too concerned with the JMW arms lack of antiskate , I never heard any degradation of sound due to the lack of it.
BTW Once I optimized my digital front end to an Auralic G2 with a Musician R2R DAC, I sold all my analog stuff and albums. The freedom to have access to all that music and explore some much new stuff with equal or better sound quality was the turning point for me. Granted my playback benefits from an all tube amplification chain and sounds just great and still very musically "analog like". Just sayin...
Heads up to Tomic601...yeh the trout should be biting well by then ,can’t wait.