Poly M40-E2 alternatives, similar headphones

Poly - Plantronics MX 200-SG4
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Poly - Plantronics MX 200-SM2
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Poly - Plantronics MX 250-E1
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Poly - Plantronics MX 250-N3
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Poly - Plantronics MX 250-SG3
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Poly - Plantronics MX 250-SG4
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Poly - Plantronics .Audio 990
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Sony MDR D777LP Altus
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Denon AH-D1000K
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Denon AH-D1000S
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Denon AH-D2000
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Denon AH-D5000
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Poly MHS113
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Poly MHS213
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Poly MHS123
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Poly SupraPlus HW251N
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Poly SupraPlus HW261N
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Poly C70
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Poly SupraPlus H261H
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Poly CS 70N UK
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Poly SupraPlus AH460N
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Poly CS 70N Euro
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Poly Voyager 520
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Poly Voyager 815
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