Monsignor, I would keep in mind that most or all of the multitude of cable suggestions that have been made are based on experiences with systems that are much more accurate and musically resolving than the results you’ve indicated your setup is providing. And the results you’ve described are not surprising, given that the most expensive Auris product I see listed sells for $169, while providing DAC as well as Bluetooth functionality.
So my feeling is that the intrinsic differences between the cables that have been suggested will be swamped by the inaccuracies of the Auris device, and will not be perceivable in your setup. Also, I see that the $169 bluMe device, which I suspect is what you are using, has a particularly low output impedance (57 ohms), which will also work in the direction of reducing sensitivity to cable differences. Especially in comparison with the tube-based products that I suspect are used by many of the others who have posted.
Also, I see that the bluMe provides an optical S/PDIF output as well as unbalanced analog outputs. If that device is what you are using, it may be worthwhile trying a digital connection to the Wadia, rather than the analog connections you seem to be referring to.
In any event, good luck as you proceed. Regards,
-- Al