Seems like the OP needs a new audio chain:
- server/streamer
- DAC
- preamp
- amp
- speakers
- cabling
- maybe power conditioning
Decisions:
- tube vs SS
- Separates vs integrated (preamp+amp). Integrates saves on casework and cabling, but less flexibility in upgrading vs separates. Integrates built in DACs are often subpar to stand alone DACs since they are often built as an afterthought to a cost point, but a few integrates have good DACs. Even fewer integrates have a built in streamer.
Starting from scratch, one can choose amp first then speakers, or speaker first then amp (which is my preference)
Both speaker and amp choices are highly subjective- there are many great sounding components, but few that would subjectively resonates with you (pulls you into the music). So best to demo yourself to find what you like. Check out high-end audio stores and audio shows like AXPONA.