You’re where I was 6 years ago, great speakers, crappy front end. Buy a used Innuos Zen Mk3 and a decent DAC like a used Schiit Yggy. They’ll make you happy!
What next?
I have restored a Marantz PM94 and have recently purchased a pair of Von Schweikert VR4.5 speakers, am using Apple Music through my iPhone. What would be recommended to improve the sounds? Also have a restored Sansui 9090DB with stacked Advent speakers. Just read on the forum about the value of preamps and wondering if I should be looking at a tube preamp to add to my systems? Am retired so not looking to spend big bucks. Thanks in advance for suggestions.