Well the Polaris just got here after an 11 day journey from Arizona. It's really easy to say it was worth the wait. Setup took me quite a bit as my desk situation just wasn't ready for the number of cables required by both the Modi and Polaris
so I was dying to just plug in my phones and hit play.
Needless to say I got a big ol' smile on my face as soon as I queued up some Christy Baron on my HD650s. I was doing a goodbye listening session with the O2/ODAC this morning to prepare myself, and I was expecting to require A/B testing to discern the differences between the setups. No need, the differences are quite night and day.
What I noticed after about 30 minutes:
-a blacker background
-expanded sound stage with some actual LAYERING
-removal of any sort of "veil" or "grain" over vocals
-improved timbre and tonality of instruments; trumpets actually sound like horns and are easily picked out in the mix
-tighter bass, it feels like the amp has a real grip over the driver
-less splashy treble
I couldn't be happier with my purchase and I have yet to even play with any of the settings or test the HD600s. Can easily recommend the Polaris to anyone looking to step up from entry level source equipment without breaking the bank. May write a full review but I don't know if I have enough amplifier experience to do so.
EDIT: Pried headphones off my head long enough to snap a picture.