As someone who did something similar to what you are doing…..
I moved from the bluesound to an outboard DAC with the bluesound, to an Aurender and each time there was a worthwhile improvement. I also agree with @ghdprentice and @oddiofyl . I know how much people like Roon, but I did not like the price, and the software for Aurender is great and is included. It’s better then the bluesound software, which was very good. Just be aware either way you go, you’ll have to get used to the new software.