Now that my trusty Plantronics Explorer is dead (it just gave up last night, not holding charge, nothing), the time has come to move on to a new Headset. Requirements - - clarity - range - ergonomic to wear, should be switchable between Left to right. Budget - reasonable 2-4k Should be able to pair easily with BB,Android and Windows phone. Preferably with a Micro USB port for charging so that the charging options are standard. Thanks in advance!