I just hope it has a Digital-out (USB or Toshlink)
Sadly, I doubt it.
I've seen AR-M2 battery life mentioned as 8hrs, which, let's face it, is...
average, much like Cowon's Plenue P1
I appreciate Sony making a proper effort with battery life on the ZX2. I really do. It's just that I think they've gone too far, by crippling the power output to an absurdly-low 15mw pc and by making the ZX2
unnecessarily bulky, by comparison with the ZX1.
IMO, a lithium cell
in between the size of that in the ZX1 and that in the ZX2 would have been more pocket-friendly, and an increase in headphone power output was very definitely warranted. Even at 70-100mw pc, they could still have achieved better than 10hr battery life. 30-60hr battery life is
nice, but not at the cost of unnecessary bulk and puny power output (OK, it may help for power-guzzling WMPort => external DAC purposes, but still, that's not really the
primary priority for true pocket use, and a way of charging simultaneously during DAC usage would mostly solve non-pocket external DAC usage issues - something the new dock appears to address...)
With 8hr (approx) battery life, and (I anticipate) probably no digital-out, I don't think the AR-M2 will be for me, but there are more and more DAPs of this kind of form-factor appearing, and, sooner or later, each of us is going to find a model whose various spec compromises suits our individual needs. So, in that respect, I say the more the merrier.
.