were do i find music online ???


hello there guys !! 
i am new to this ,, and i rescently powered up my first stereo sound system that i was bulding for 6 months now ,, my source is my mac, and  i use a benchmark dac 3 pre amp ,, but i don’t know were to play music from , i have downloaded tidal , but i didn’t hear the quality i was expecting 
any other sourses to enjoy music from my mac ? 
thanks 
128x128dimitris7
@freediver 
thank you, i will take into consideration what u said , its my first week that i powered up my system , and i will spend some more time positioning the speakers and fix my room and see how it goes  
dimitris7 if this is the first week with the system those speakers are going to need SERIOUS run in to completely open up...The Zensors I had didn’t come alive till wayy after 300 hours,sounding as you described,tonally flat & boomy on the bottom.I also recall they sounded best fired straight ahead,no toe in...As for the room first kill any reflections(echo's)...Give everything a good  run in & then re access.
Try Acoustic Sounds HighRes downloads-http://store.acousticsounds.com/cat/365/Digital_Download
or consider getting a Rega or Oppo CD/SACD/BluRay player and try physical media....
I gave up on streaming.  Perhaps it is because I am limited to DSL, no cable where I live.But I get great results downloading torrents, which are free. 
I don't bother with MP3, just download HD, eg flac.Save it all on xternal hard drive.