I'd replace your Oppo first.
Try to audition a Coda Continuum No. 8 ($5k retail without meters).
I haven't heard any of the amps on your list. There are some comparisons of Coda and Pass if you search the internet.
Try to audition a Coda Continuum No. 8 ($5k retail without meters).
I haven't heard any of the amps on your list. There are some comparisons of Coda and Pass if you search the internet.