A little help with a source

Hi All, 

I write because I have finally come to the point where I need to pay attention to my source. I listen literally to everything(except country) but am currently listening to a lot of jazz and electronic. Currently I have a need to pay attention my source. Ideally I want to keep things simple and go with something that will stream high res files (tidal) but can also serve as a stand alone server for my library of CD's.I am currently running the following equipment:

Pre: NAD 165Bee
Amp(s): Anthem MCA 20,  Red Dragon Audio  M1000-MkI Mono Blocks, Red Dragon S500
TT: Project Debut Carbon
Speakers: Gallo Ref 3.1, Green Mountain Audio Continuum I, Magnepan 1.5qr, Magnepan MMG's, Spatial Audio M3's
Cables: Anti Cables throughout

I would like something simple and cost effective (I am a poor audio enthusiast). Any direction or advice would be much appreciated!!!

Thanks in Advance!!