That really not an equal comparison, but close...
The differences between the 103 and the 105 are that the 105 adds a dedicated 2CH analog output with high end DAC, digital audio inputs with asynchronous USB input, and a quality headphone amp. If your needs do not take advantage of any of those features, then you would obviously choose the 103.
The differences between the PM-1 and the PM-2 are not nearly as paramount.
ALL of the differences are not clear yet since the PM-2 is yet to be released, but what we do know is that the PM-2 will not have the fancy wood box, it will not have the softer lambskin, and some of the highly precisioned metal parts may be replaced with high density plastic parts.
However, Oppo says that the drivers are identical, and as such, the sound should be identical or very close to the PM-1.
If your reason for passing on the PM-1 is due to the price and fancy trimmings, then the PM-2 will probably be a no-brainer at it's price point.
Personally I am struggling with that exact choice myself. The PM-1 are so beautiful, and the user feedback is so positive, it is very difficult to not pull the trigger.
In fact I probably would have caved already if I had the cash on hand, but it'll be maybe another month until I do, and that is when the PM-2 is expected to street,
so that might make it an easier choice when it does and we start seeing real PM-1 vs PM-2 comparisons.
If I had money to burn though, I would have bought them on day one.
Okay Mr Smartypants...
I defend the comparison because, per their business model with the BDP's, they are offering a luxury edition and a more practical edition. Hopefully, like the BDP's, both PM's kick serious booty