It works for me because I choose headphones which are pretty much exactly what I want to hear and tweak the rest as required. I wasn't talking about loudspeakers or room dynamics because this is a headphone forum.
I didn't say the O2 is special. What I said was that it's "fully transparent" but not truly portable.Anyway, surely the point of the X1 is that it's portable and relatively cheap? Not many people are going to be pairing it with LCD's, surely? As long as it can drive my M-100's I'll be happy to buy one. And I'm sure it can because my lowly Sansa Clip+ does.