Hello from Atlanta!

Hello from Atlanta! Audio is my hobby as a result of my avocation of music performance- I play trombone in big bands and have done so since college, almost 50 years.

My gear is as follows:
Oracle Delphi TT w/EY2 arm and Panasonic strain gauge cartridge (for which I'm seeking a modern, sonically superior pe-pre to replace the original Precision Fidelity unit);
Philips AH-6731 black AM-FM, recently refreshed;
BAT CD (tube);
BAT pre (also tube);
Sunfire load invariant 600-2 2 ch amp (600W@8/1200W@4 & 2400W@2);
SoundLab Aura electrostatics

I'm looking for info on upgrades and replacement parts ,and to deepen my knowledge.
Thanks!