I’ve changed amplifiers, solid state as well as tube over the years and what has lasted in my system is the Cary Audio SLP-05 with the Ultimate Upgrade and Cardis Wiring. Hands down, the best I’ve owned and believe me I’ve owned some serious hi end SS & Tube Preamps. Check the reviews. Oh and if you want one of the baddest headphone amplifier from a preamp, look no further. Incredible with my Audeze LCD-4’s.
https://www.stereophile.com/tubepreamps/906cary/index.html
https://forum.audiogon.com/discussions/is-the-cary-slp-05-still-relavant
https://forum.polkaudio.com/discussion/177419/tube-preamp-review-mcintosh-c500t-vs-cary-slp-05
https://www.hometheatershack.com/threads/cary-audio-slp-05-preamplifier-review.20652/