There are lots of things that "improve" the sound of a player. The power supply has many parts. The Audio Magic thang is not a clock, by the way. It is a power filter and so is the Bybee thang. I have used both. I do like the Audio Magic thang. However, doing these things alone will bring very little change to a stock player. You really need to address the player as a whole: output stage, clocking, power supply to output stage, power supply to clock, power supply to DAC, raw DC supply, raw AC supply, damping, wires, jacks, etc. etc. Have been modding players and DACs for over 30 years. There are no shortcuts.
The rumor is that the new ESS DACs do indeed sound better, so I would imagine the stock 205 sounding a little better than a stock 105 (if it indeed has a 9038 DAC in it)......but without mods it will just be nice, nothing special. Yes, I will be modding all the new Oppos.