Dear Montepilot: As you reviewed your Reed tonearm is really good, no doubt about.
Please don't think I want to hi-jack the thread because I did not I only want to help you to achieve a better performance from your Empire D4000III:
this cartridge was designed specific for been loaded at 100k to take advantage on the cd-4 recordings with frequency beyon 50K, loading the cartridge at lower impedance affect the real quality performance the cartridge could shows you. In the other side the cartridge stylus profile made it very sensitive to azymuth changes and " playing " around with azymuth cartridge set-up could be worth the time to.
I own two sample stylus too and in my case I found out ( remember that the Empire cartridges are a 30+ years old design: not a " fresh " one. ) that are differences on quality performance in between, small ones but differences you can discern. I don't know if you already try your both samples but you can try and see what happen.
Other subject is that many of these MM/MI cartridges came a little loose in between the cartridge and the stylus plastic body, well I improve the cartridge quality performance when I glued the stylus plastic body to the cartridge it self in a way that there is almost no movement in between when on playback.
I hope this could help you to improve the quality performance on that cartridge.
Anyway, very good review!
regards and enjoy the music,
Raul.