NAS Upgrade Advise

[Enquiries]

I own the DS214play. I mainly use my NAS to stream music files (FLAC and WAV). I also use it to do long-term storing of pictures and some videos. I keep most of my videos and pictures in Google Drive, though. I also keep a few important text, Word, Excel and PDF files, but not a lot of them.

So, my question is, keeping in mind that I mainly use my NAS to stream HiRes music files, would my best upgrade option be to go to the DS220+, DS224+ or the DS723+?

I have 1 Gig home network, wired CAT5e.

Thanks.

Cheers!