Nice system and if you are happy then good on you. You also know that the equipment was cared for. If the capacitors are not swollen, or leaking you should be fine.
There is some good input concerning a good DAC and streaming. Consider looking in better source quality and music selection, first. Pardon, if I assumed you haven’t already as you didn’t mention your source material. Qobuz is a streaming service that provides a large selection of hi-rez music. A quality streamer such as a dedicated NUC computer running Roon (software musical interface) as it functions as a utility is economical, fairly east to set-up and works well IMO. Happy listening.
There is some good input concerning a good DAC and streaming. Consider looking in better source quality and music selection, first. Pardon, if I assumed you haven’t already as you didn’t mention your source material. Qobuz is a streaming service that provides a large selection of hi-rez music. A quality streamer such as a dedicated NUC computer running Roon (software musical interface) as it functions as a utility is economical, fairly east to set-up and works well IMO. Happy listening.