Digital streaming/library


I have purchased a rather substantial 2 channel audio system, and two of the components are a streamer and an audio nas...a melco. I want to build a digital music library. I would love to have the hd level tracks, but the downloads are so expensive. I already have thousands of lps, and thousands of cds. I have iTunes, and it (and rhapsody) allow you to download tracks into your computer...but they are not cd quality. I have a streamer, and I could get the tidal or deezer hi res subscriptions, but do they allow you to download tracks into your computer/nas drive for a digital library?
easola01
Well, I guess I will have to stick with itunes then. With itunes, you can download tracks/albums right into your storage device. Rhapsody too. I was hoping to get better resolution than the 256kbps from itunes, but okay!
easola01, It is best to avoid conversion by Audio Core.  Because I play 16/44.1 I set Audio Media to 16/44.1.  I tunes gets my CD without any conversion as 16/44.1 and sends it to Airport Express as a data.  Airport Express send it to my DAC as 16/44.1

Shadorne, Audio Media was set as 16/44.1    In fact AirPlay was not even shown as output device.  When I added it, it showed as 16/44.1
Okay thank you kijanki, but I am wanting to build a library from what will be a boatload of music I do not possess in cd format...music I don't possess and music I haven't heard yet but will while I am browsing my streaming. I am just surprised that, given the fact that one can build a library with itunes and rhapsody, both which are lossy, that there is no comparable way to do the same and build a library in lossless files?
easola01, I'm not familiar with streaming.  My whole library consist only of CDs on HD  in ALAC format.
Thank you for your input kijanki. I must confess, your informed advice is above my head, but I want to do things right. Since it seems I am unable to build a lossless library from tidal or deezer, maybe I will do what cds I have your way. 

So what do I do...are you saying I need to get this audio media, and that alone will convert cds to library from itunes to my storage as 16/44.1? Sorry, I need baby steps here