Fidelity Research 64s vs Jelco SA-750e

Currently I have a Jelco SA-750e (10 inch) arm on a Sota Star Sapphire with a Koetsu Rosewood Signature. This runs to an EAR 834p, Thor TA-1000 pre, Quicksilver v4 monos, and Verity Audio Parsifal Encores. The sound is very good now, but I wonder if I could decrease record/surface noise and increase bass and dynamics with a better tonearm.

Obviously the Fidelity Research 64s is better than the Jelco, but can anyone offer opinions about what kind of differences I might hear and the magnitude of difference, if I change the Jelco for the FR? Trying to decide if it is worth the extra $1300 or so to upgrade.

Thanks everyone!