Beautiful music, beautiful system. The front end is all you need. After the 70s there came such a heavy dose of marketing B/S that it ruined a great hobby.
You've got a Nakamichi 410 pre-amp, I see. I've had mine since 1977. It's hooked up to a Quad 405 power amp driving ADS 1230 speakers. A marriage made in audio heaven.
What cartridge Is that. Anyway a SME arm Is the only arm to buy. No trace of mistracking and that Is a very good sign. Even surface noise Is under control. All due to SME arm, no doubt.