Is OPPO losing it's way?

I second oddiofyl.  The 103 is best with an external dac and makes a great streamer. If you like Pandora on the 103, give Tidal a try.  

What about inexpensive mods to an Oppo 93? Would a DAC like a Schitt Modi 2 help? Any other mods?

I don't know about the Oppo Sonica.  It uses a switching power supply and from my own experiments that is a big no-no in analog stages.  I have also tried iFi audiophile power adapters that uses noise cancelling technology and my $40 linear power supply decimated it.  I measured the noise on a Tektronix 150Mhz analog scope and the switching supply had more noise although both were quite low and I was getting to the limits of my scope.

I’m waiting for the future 4k replacement for the Oppo 105 as my next bluray player to replace my current 103. Hopefully it will be a well thought out, audiophile product. That will also be a good time to upgrade to the latest 4k full HD tv.

Hi gdhal,

Well-modded players can be giant killers. As stated by dhl93449 and ricevs above, the output stage plays a huge role as does the power supply. Better clocks too if applicable. Cabinet and transport damping makes an audible improvement. Racks/footers/isolation platforms as well.

All of the DAC chips mentioned/recommended above are more than capable of SOTA sound given the right inputs and outputs.

Best to you gdhal,
Dave