If you want better quality go for TIDAL.
When I reviewed Tidal, I came accross many tracks that was NOT lossless, even some unbelievably crappy 96kbps tracks.
So I rage-quitted the service, and now fight against spreading the Tidal marketing ********s. So, I've have to correct you, not all tracks have better quality than Deezer/Spotify.
As far as I know, only Qobuz have 100% of their catalog lossless. but their catalog is not as good.
Deezer has raised 100 millions €, if only they would extend Deezer Elite (FLAC) to all subscriber not just Sonos speakers...
Same here, and I wish it has more Open API and integration services, it can be used on Google Cast and Logitech Media Server, but cannot use it yet with my openupnp/dlna/openhome ecosystem.
As a premium subscriber, I don't have complaints with Deezer 320kbps. no problem so far on my smartphone, I love the app.
On PC, I don't like to use deezer with my browser (because of Flash!), so I use LMS + LMS-2-UPNP + Foobar2000. So I can use my foobar DSP and output device of my choice, at the price of a much weaker ergonomy.