I have a pricey playback design mps-5 in my main system which is better than the oppo 105 in my second system BUT costs way more.
I recently upgraded the interconnect used with the oppo to my integrated amp and that made a big difference. The Oppo was a little lean bit flat even played thru my VAC amp and Harbeth speakers HOWEVER upgrading to Synergistic Research atmosphere level IV interconnect gave a more liquid larger warmer sound yet retaining the details.
I also upgraded my speaker cables to SR Atmosphere as well as atmosphere HC power cable for my amp.....now big Soundstage TOO
My point is the Oppo can sound great with right cabling so would wait to mod it until after you try that first
I recently upgraded the interconnect used with the oppo to my integrated amp and that made a big difference. The Oppo was a little lean bit flat even played thru my VAC amp and Harbeth speakers HOWEVER upgrading to Synergistic Research atmosphere level IV interconnect gave a more liquid larger warmer sound yet retaining the details.
I also upgraded my speaker cables to SR Atmosphere as well as atmosphere HC power cable for my amp.....now big Soundstage TOO
My point is the Oppo can sound great with right cabling so would wait to mod it until after you try that first