i've still got my Plantronics .audio 90 headset from 2000 (Same cans as the DSP500's, without the DSP dongle, lol). Still works great. I guess I don't bother to run mine over with my chair enough for me to get a new pair. I got a newer set during Christmas, but didn't like them much, so I re-gifted them. ... thats right, whenever i kill you, just think... "that guy's using a decade old headset/mouse/keyboard/mousepad and on-board sound..."
Oh, and I forgot to mention these were FREE... direct from Plantronics, lol. I was in college back then, no extra dough for toys. Gotta love Plantronics customer service.