I had a chance to quickly try out Etymotic’s new premium hf2 headset with my own iPhone. It promises not only exceptional sound quality but the best noise isolation of all competing headsets. The hf2 did a nice job of blocking out the din of the Macworld show floor, and our The Hives tracks sounded loud and clear but a little harsh with our iPhone set on the Rock equalizer setting. One booth rep told me that most Etymotic employees prefer the Flat setting, so you can hear songs the way they were recorded. Things improved when I switched to this mode. Is this thing worth $179? Stay tuned for a full review. We’ll put it head to head against the Editors’ Choice-winning Shure MPA with SE110 combo as soon as we get a set in.