Good headphones

I want some cheap and good headphones. I'm currently thinking about buying a Steelseries 3H V2 for 40 euros but I have a question. It is written that these headphones have a retractable microphone. Does that mean that I can take it out and throw it away? I have a separate microphone which I wanna use instead of their cheap one. Besides all that, perhaps somebody can suggest better headphones for a similar price?