@robal - I have not had the opportunity to hear Aurender. I do own the Innuos Zenith MKiii and have been very impressed with the product. Sound quality is fantastic, the user interface is intuitive, their support is top notch, and Innuos is always making updates to their software. I strongly recommend Innuos for all of the above reasons. Top notch company.
The only streamer, from what I’ve read, outside of the uber expensive ones (Taiko, etc.) that *might* sound better is the Grimm MU1. Lots of people seem to rave over that streamer. Someday I’d like to hear it myself to compare.