Oppo 205 revelations, questions..

Just installed my OPPO 205 27.09.18. •Surprisingly pleased with having a volume control on the remote! No comment on its quality just the pleasure when answering the cell. Hadn’t even checked the features of the 205 before buying- just wanted to grab this “Swiss Army knife equivalent in disc spinners. 
•Dr. No, 1st James Bond flic,a very old DVD,was very significantly enhanced on my 52 inch Pany plasma from 8’ viewing using HDMI . I was surprised at the improvement of this low budget film. Sound quality also significantly more clear and dynamic than that off my Lexicon RT 20, which I had found acceptable for DVD’s. No going back. 
•Improvements to sound on CDs obvious from the first turn on.  I will listen to some RR discs tonight to use for comparison after a week of “break in”. 
•my biggest take away from the improved CD sound : an itch to obtain even better CD sound from a dedicated DAC. Perhaps a Berkely DAC 1 or ?? Something similarly economical but better??? Thanks in advance for comments on this. 
•I set the the DVD 24p conversion ‘on’ and custom resolution to 1080p 24 hz. The movie looked good. Is this the optimal setting?
• obviously I was one of the last few to receive a 205. I’m fully satisfied with purchase; and consider myself very lucky not having to to consider other options. Thanks for reading. Pete