so after my finding out the hard way that Apple did not include pre-amped line-in on their powerbooks (why Apple why?!?) i've been looking into USB headsets. At first i was looking at Logitech but after reading reviews of the 200 and 300 i was far from impressed. so now i'm looking at either of these: Sennheiser PC155 Sennheiser PC135 Plantronics DSP-500 Plantronics DSP-400 I'm thinking that i would probably go with the smaller of each brand (PC135 or DSP-400) The reviews of both have been great (the Sennheiser a little better) but i love the fact the the Plantronics DSP-400 fold up so they would be easy to carry since i'd use them with my PowerBook as well as my PC. Anyone have any suggestions? Any other suggestions in headsets i should be looking at?