3. Anyone using noise-reduction headphones with the D2? Opinions?
My D2+ arrived today and I've tried it with two pairs of my headphones. With the circumaural and cheap Senn HD497 the D2+ sounds a lot better than my old X5. With the supra-aural and a little pricier (noise-cancelling) Senn PXC250 it sounds better than that. I have it at 40 / 50 on volume. It doesn't sound -loud- the way that an ipod sounds loud. There isn't any crud or hash, the volume just goes up with no loss of quality.
The D2+ sounds very, very good to my ears, with these two headphones. I can't abide earbuds and haven't tried any.