Basically I upgraded my Senn 150 headset to the 595 set and bought a desktop microphone. The problem now is everyone says my voice quality is rubbish. What options do I have? The mic is a logitech digital one - but I can't find anything else..choice seems to be limited. A friend has just ordered a plantronics P151 mic thingy - but it's over ear...so would be awkard to use with a headset. Are there any good quality desktop mics out there - or ones which you can clip to your shirt or somethin?