Fidelity Research FR14 as good Sonically as FR64 or Jelco750?

"Is the FR14 as good musically speaking as FR64 or better than a Jelco 750 series? " 

My answer is respectively No and I don't know

"whats the next step up from a Jelco? I want the best or close to the very best ever for under 1500."

The best tonearm I owned in that price range was a pre-owned (NIB) Basis Vector 3. A great tonearm if you can find a deal. 

Dear @vinny55 : These are very good alternatives inside your budget:

https://www.audiogon.com/listings/lis8h6dg-ortofon-ta-210-tone-arm-tonearms 

here the Ortofon info:

https://www.ortofon.com/ta-210-p-432

https://www.audiogon.com/listings/lis8i4bd-origin-live-encounter-mk3c-9-inch-rca-terminations-great-...

Origin live as Ortofon  needs no presentation. Both tonearms comes with phono cable interconnection cable.

Your choice.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.

@rauliruegas +1

The Ortofon with removable headshell is a great choice if you are changing cartridges frequently.