Slvrsrfr im not a headphone guy however I think you would be very happy with the Cord Dave dac with headphone input though expensive even used for what it is I would urge you to try it first with your Utopia headphone,
Or upgrade the sound quality of your Oppo 105 with trying out the Empirical Syncro Mesh Reclocker which transformed playback of my Modwright Oppo 205 and Denafrips Terminator dac.
Or upgrade the sound quality of your Oppo 105 with trying out the Empirical Syncro Mesh Reclocker which transformed playback of my Modwright Oppo 205 and Denafrips Terminator dac.