Only using Spotify connect, am I loco??!!

You have nice components in the system. As long as you are enjoying the music and your experience, how does it matter? One of my friends recently purchased a pair of Revel F36, a Hegel H90 integrated, Audio Envy speaker cables and Inakustik CAT7 cables. That's all. He has been thoroughly enjoying his system each and every day for the last month or so. He also uses Spotify, but has been thinking of Amazon HD. I also use Spotify with Chromecast Audio's DIGITAL output to my Oppo's (SP/DIF) "optical" input. I thoroughly enjoy the experience, though this is secondary compared to my SACD/CD playback which is primary.More will obviously change your listening experience. Look at cables, power conditioning, dedicated DAC, footer tweaks, etc if you want to go on a merry-go-round. If you are enjoying the current setup, don't change anything. Enjoy your music.

@uberwaltz,
Agree with you that Spotify SQ is not as good as Quobuz/Tidal. Compared that in my system. Also compared that with Amazon HD at friends place. On music that is nicely mastered or has live recordings, you can appreciate the quality of Tidal/Amazon over Spotify.