Awesome meet, thanks for having us Andy!  Glad we finally got together.   Lunch was great as well. 
 
Regarding the Amarra vs PWD, I was hearing a big difference on the HE90...the PWD sounded way better.  I think there was definitely something wrong on the OS/software side of your computer though since I've never heard that drastic a difference between two sources before. 
 
Highlight for me was finally getting to hear a DIYT2.  Incredible.  I think the 007 shows differences between amps more than any of the other electrostats (maybe because it's harder to drive or I'm really familiar with it?) and the DIYT2 sounded a lot like my BH but even better.  The bass was incredibly tight on it.  The KGSSHV didn't have as much control on the 007's bass, but it was a nice different flavor to have.  Got to switch between the DIYT2 and the Aristaeus a bunch with the HE90 and they sounded quite similar except the DIYT2 had a little bit of shoutiness in the upper mids.  I kind've expected this since the HE90 had the same problem with my BH, but the DIYT2 was better about it.  I really can't wait to get started on my build now.