moose89, I have to very much agree with @carlsbad2 that at the moment Spotify is your most limiting factor. I think you owe it to yourself to check out a streaming service that streams at CD quality and above.
I had a Chord Qutest in my main rig for a number of years and it is a wonderful piece of kit ... still have it in a second system ... and from everything I've read the M Scaler takes it to another level.
And while I agree that the DAC is of more importance than the streamer, I wouldn't underestimate the importance of the streamer when all is said and done.
My main rig currently features a Hifi Rose RS130 streaming to a Rockna Wavelight, and the RS130 is the best player I've experienced in my system, even better than the very competent Bricasti M5 it replaced. And the M5 was a big step up from my Bluesound kit. And this is not to knock Bluesound, as I have 4 pieces of Bluesound kit scattered about the house and got my start with streaming in 2014 with the original Bluesound Node 100.
(And if interested, I have different iterations of my system available for view on Audiogon)