I am a systems administrator in a call center, and I am constantly replacing headsets for the callers. It isn't because the callers are deliberately breaking the headsets, it is because the ones we buy (Sennheiser PC131) have horrible build quality. My question is, what are the best, sub-50$ headsets with the best sound, and fairly comfortable that I can buy to replace the broken Sennheiser PC131's. They also need to be 3.5mm connectors, and not USB. Thank you!