Sony has introduced four new pairs of headsets for the iPhone and iPod. Featuring in-line three-button remotes and microphones, the new DR‑EX300ip, MDR-EX38ip, DR-V150iP, and MDR-E10iP all offer complete compatibility with the third-generation iPod shuffle, second- and third-generation iPod touch, fourth- and fifth generation iPod nano, and iPhone. The DR-EX300iP in-ear headphone features a 13.5mm Neodymium driver that’s oriented vertically in…