I bought the Beyerdynamic MMX 300 at a cheap price because i need the microphone sometimes. The sound is very clear, especially on the highs. Oh and also the Creative Titanium HD 

Thanks all 

Hi everyone from a newcomer!   I am willing to buy a set of headphones for gaming and movies and i'm heading for the AKG K550 (or maybe Beyerdynamic MMX 300?). I have a built-in Creative X-FI 2 on my motherboard and will probably buy a real x-fi dedicated soundcard. Do the K550 need an amp...