I'm going to buy 1 of those but don't really know which one 2 choose since they're all the same but differ in the USB soundcard and sound quality. If anybody has already owned one of those, pls write a few comments. Thanks! :]

i am srry to say this but i have 2 sennheiser and it are terribble headsets , its better to get a steelsound 5h v2 usb than sennheiser. When u put yout steelsound on ur head its feels much more confortable than a senneheiser.
My opinion :(

pc 350!

151 is old model
Difference between 161 and 166 only in USB-soundcard that included in a kit. I known it for special from Sennheiser support.

Buy 161 ofc, gl