I got mine from here and I like them.

Ditto.

Is it a USB adaptor or a USB hub?

Yes, the one I missed.

Interesting, I only have Schiits in silver. I didn't know their black color is sometimes gray.

Press the button and hold to go into NOS mode.

Yes, in my opinion.

After comparing them for a couple of days, here are my impressions about MM1, MM2, and Modi+. I may be wrong. Brighter MM2 >= Modi+ > MM1 Resolving MM2 > Modi+ > MM1 Harshness Modi+ > MM2 > MM1 I am going to keep MM2. It's a perfect DAC for my HD650 and HD58X.

You can also try the MM2 in NOS mode.

You may only need equalization. My HD650 with the right EQ produces an excellent Hi-Fi experience.

I need more time to listen to them, but at this point, I feel MM2 is more resolving than Modi+. I am not saying there is a day and night difference between them though and I am not sure what improvement you are looking for. I will be happy with either of them.

This is my first post here since 2016. Finally, I got my MM2 this morning. Here is my first impression, MM2 is more of an upgrade from Modi+, and if you are looking for the original MM sound, MM2 may not be what you are looking for. But I still think MM2 is technically a better DAC than the...

Where did you get this graph?

  I don't know how much bass quantity (HD800 has excellent bass quality, IMO) you're looking for but I don't think the GS1000 or HD700 work for you.   I suggest you to try Beyer T1 with a good tube amp (e.g. WA2), to me the T1 is the bridge between HD800 and HD650.

  Well, I don't have any comfort issues with L-cush, but I know it doesn't work for everyone.