I bought the AKG K528 headphones nearly 2 weeks ago via amazon. I had to pay circa 50 pounds. They arrived after two days and I instantly tested them.
Comfort:
The AKG Headphones are really easy to adjust in size so it fits quite exact to my head. They are very tight but still very comfortable.
Sound:
The headphones absorb the environmental sounds really good, so you can just enjoy the music. And the sound quality is just genius! But there is a little bad side of this headphones: high pitched "s"s do not sound really good! But there is nothing else to complain about.
Stabilty:
The K518s are not easy to break! I use them every day for nearly six hours altough they are often in my school bag with my books et cetera and I think they will hold quite a long time!
Conclusion:
These headphones have a very good prace/performance ratio, so I can recommend it to everyone!