Recs.
Updated
The Fidelio X2 is a pair of open-back headphones which produce powerful, boomy bass, well-detailed highs and impressively wide sound stage. The two-piece headband design makes these extremely comfortable to wear.
SpecsUpdate
Pros
Pro X2 model allows for easier change of the ear-pads.
When upgraded with lamb skin ear-pads these headphones can beat almost any sky high priced Hi-Fi Man and Audeze and gets very close in sound to 1000 and LCD correspondingly. If you are looking linear frequency response and believe that you are capable to hear amplitude-frequency LFO-style modulation from higher frequencies, then you probably should pay 2-3K$ more for the high-end headphones.
Pro Large ear pads are comfortable
The large ear cups go over the ear instead of sit on them, so no pressure is applied onto the ears. The ear pads on the other hand feature really soft and thick memory foam as well as high quality velour material on the pads' surface. These feel really soft on the sides of the head, and allows some air to circulate around the ears, minimizing heat.
Pro Wide sound stage can result in an immersive audio experience
The wide soundstage heightens the feeling of immersion in in-game audio. The top-notch positional audio allows gamers to easily identify sound sources, like the movement of nearby players or the direction that bullets are coming from.
Pro Fun sound signature with powerful bass and crisp, detailed treble
The bass is really powerful yet also tight. The highs are boosted so audio details are quite prominent. The mids, while not as up front as the bass and the highs, are clear and present.
In-game sound effects will come as clear and detailed, while explosions, gunshots and similar sound effects are really powerful, making these really fun sounding gaming or movie headphones.