Not sure that I would pick the Lumin T2 because it still has a switching power supply. Look for a linear power supply, even in a streamer.
As far as Oppo, you can do a short-term patch by upgrading the 105 with a linear power supply for digital. Even though it has a linear power supply for analog stages, it still uses switching power supply for all digital sections:
https://www.oppomod.com/
$380 for a LPM SE for the 105 will significantly improve its digital section for playing CD/SACD. Then you can focus on finding a really good streamer/DAC.
As far as Oppo, you can do a short-term patch by upgrading the 105 with a linear power supply for digital. Even though it has a linear power supply for analog stages, it still uses switching power supply for all digital sections:
https://www.oppomod.com/
$380 for a LPM SE for the 105 will significantly improve its digital section for playing CD/SACD. Then you can focus on finding a really good streamer/DAC.