I own both the Zen Mini 3 with LPS and the Zen Mk3.
I think either will be a considerable improvement over the Bluesound.
Aurrender is also a good choice, but you are limited to Qobuz and Tidal.
I like the Innuos due to it integrating with Roon, which I find to be worth the money.
Take a look at the Aurilac Aries G1. One of my audio friends believes it to be a great deal for the money.
Bob