Here's another PM-3 review (headfonics) that I found today, some comparisons on page 2.

Per Oppo:   The PM-3 needs a tight seal between the ear pad and the driver front baffle in order to work properly. This is why the ear pad attachment mechanism is very different from the PM-1/PM-2. Removing the ear pads requires some brute force. With skill and luck nothing bad will happen...

Another review   OPPO HA-2 DAC and Headphone Amplifier Review - Secrets of Home Theater and High Fidelity   Some lab tests

Also noted in the DAR review (factory/PM-3)  

^ Some nice Images from the above DAR review showing the some representation on how a portion of the PM-3 manufacturing process.  To learn more read his article.  

Oppo Digital AU is actually Australasian distributor International Dynamics as a FYI.    Both Oppo Digital AU and Oppo Digital NZ share the same web design.  

PM-1/2 is larger and designed with actual snap in points for installing/removing pads.  The PM-3 only offers the ability to replace the pads from a maintenance point of view.     Look at this image for size differences, PM-1, PM-2, PM-3 from left to right  

Sounds like what I saw over a month ago, good!

Another video of someone with a HA-2  

You do know that they blabbed online when the launch date was.  

Yes

Oppo Shows PM3 Planar Magnetic Headphones for on the Go​ - CES 2015 - Sound and Vision          

Very recently I found VOX 2.4 (build 2400.112 12/16/2014) plays DSD files now!  Tried it with various .dff and .dsf audio files, played them all without issues.  Not bad for freeware IMHO.     Then there is this posted on their web site and twitter 12/12   Something new is coming… Be ready...

Matching colored cables also.

More images as seen on http://pj.hiapk.com/earphone/141031/1558850.html              

Thanks for posting this news on two products that cater to mobile/personal audio marketplace. 

How does a headphone amp/DAC with a very flat frequency response denote a very bright response, that would be the fault of the source or the headphones utilized?   Example   Some people like tone controls, but they are a source of distortion adding additional circuitry in the path of...

Now available on Oppo's site   Replacement PM-1 Alternative Lambskin Leather Ear Pads $59   Replacement PM-1 Velour Ear Pads $39   Probably more will show up online soon look here. 

Now available on Oppo's site   Replacement PM-1 Alternative Lambskin Leather Ear Pads $59   Replacement PM-1 Velour Ear Pads $39

Its true by those plots that you can tailor the low end and high end a bit.   I know some love velour pads a lot (example PM-2 usage with PM-1 Velour), to me they get a bit warm after awhile but if it produces a more acceptable response go for it, they will be quite reasonable to obtain I'm...

Why? When someone tells you the sound signature is very close they are approximating the results.  But still the PM-2 trim around the grill, between ear cup, and ear cap body is plastic, not metal, so to compensate the alternative lambskin ear pads are tuned to approximate the PM-2 sound...

The PM-1 doesn't come with stands, its optional as you stated.  Ever see any stands with someone's Oppo PM-1 unboxing images or videos, no.  

The PM-1 response with alternative lambskin (PM-2 tuned_ ear pads for example are not shown.  

Since no one else has posted this yet, reflective of various pads on the PM-2   Oppo Ear-Pads Listening and Measurements - Innerfidelity    

Doesn't make any difference, you do far worse wearing them then anything that will happen to them resting on a headphone stand.