Oppo 205 uses twin ESS 9038 chips (the top DAC chip currently), tho I do not know how they are implemented - I have one
why not try one and then return it if you don’t like it?
(go thru your music collection first to find the best tests)
you may not want an external DAC - if you do, a used benchmark DAC2 will be a good one; otherwise, it may cost a lot to get much better SQ than the oppo