I agree, those are comfortable brands. The Sony is the most comfortable Sony model and despite its bulk is not heavy. I would say those are close in comfort to the Sennheiser. The Senn seems equally light (more or less) and to me was as comfortable, just a very different fit since it's designed differently. If I could afford both, the HD820 & Z1R, I would, they would balance each other nicely. Sony being a bit more laid back and fun with the sub bass (other than having a bit of a peak in the lower highs) and the HD820 being more accurate, but still fun as well.