AKG K-240 Studio

There are quite a few good qualities in these headphones with only minor drawbacks.

I tend to listen to high-definition music, 320 kbps and the likes.
What initially struck me when listening to music through these headphones is the quality. After owning cheap 15euro headphones for so long, I immediately noticed a huge increase in clarity, especially in the low-frequency spectrum.
These speakers have higher impedance than some and this causes them to be slightly less-loud, but they are still perfectly capable of drowning out any background noise, such as a TV or radio playing.
These headphones are also semi-open, meaning their sound-insulation isnt very high. This can be seen as good or bad, as you may not want others hearing your music, but it also means I can speak to others while the speakers are still on my ears

For comfort, I didnt give a fifth star for some minor reasons.
First, the removable audio jack extrudes quite a long way out of the bottom of the speaker, and sometimes snags on the collar of my coat. I dont mind this too much as having a removable jack at all is great for me, but still this is worth noting.
Secondly, the material used to form the speaker pads, while soft and easy on the skin, is leathery, meaning that if i wear the phones for a long duration, they will leave sweat-marks on the skin.

The rest of the build quality is very satisfactory, with self-adjusting headband and a good flexible, agile feel to the product as a whole- these will probably last a long time. These headphones are also very light, meaning they dont leave that annoying headphone-hair indent on my head when using them for hours.

So to sum up, Very good quality sound, Very comfortable (usually), durable.