Ordered one to replace my original first gen Modi. Should be a good upgrade. As a lot of people are in my boat (total system budget of $1500 or less), I will be doing a comprehensive review of my whole system and various configurations. Massdrop HD6XX are on the way as well.
Below will be tested and reviewed.
Headphones
HE-560
D2000 (modded)
HD598
HD6XX
Amps
Vintage Receiver Superscope R-330
Emotiva Mini-A 100
Schiit Magni
I did a lot of testing b/w my receiver and the Emotiva and found almost no difference in quality and I am personally not a believer in spending big $$ on an amp as long as it has enough juice to provide dynamic range and control. For me this means the D2000 sounds the same whether I use the Magni or the R-330 whereas the HE-560 thrives on the R-330/Emotiva but the Magni does not allow the 560 to reach full potential.
For a simpler comparison, I believe 100% that my 560's would sound better run out of the balanced output on the Jotunheim compared to the SE simply due to the increased power (3 watts vs 800mW @ 50 ohms). I believe my HD6XX would also sound better whereas the D2000 would not benefit as it would be getting enough power from SE to shine. If anyone wants to send me a Jotunheim to test this...
Since there has been a lot of discussion in here about optical vs usb I will try to provide clarity as well by listening via USB output on my raspberry pi w/ picoreplayer and then physical CD run from my bluray player via optical.
Will provide initial multibit impressions this friday when it arrives followed by full write up when i get the HD6XX in at end of the month.