Hi Windy -
I love the DAC2/WA22 combo so far, with a few caveats:
(1) I am using a stock USB cable (I ordered an Audioquest Carbon for it a month ago - it shipped yesterday)
(2) Every once in a while, I get a kernel panic (I use it with a headless Mac Mini running iTunes/PureMusic)
(3) On occasion, I've heard some weird things - like portions of songs repeating. My guess is this has something to do with the DAC2's interaction with PureMusic.
Unfortunately, I don't have any like-for-like comparisons for this setup. I have a Benchmark DAC1 USB in my speaker system, and have run the T1s through them (didn't like that so much - it was rather metallic sounding), but I never had the Benchmark hooked up to the Woo, nor the DAC2 hooked into my speaker system.
How does the Benchmark DAC1 perform with the PureMusic software, any issues like with the W4S DAC2?