I'm thinking of buying the k550. But I want a very good headphone that will last a while. So is that more expensive denon worth the extra? I'm rather new to good audio with my very good hi-fi set. comparing with this set, I know that my current headphone sucks and I want a really good headphone...

While searching I came across this site a lot, so I decided to ask it here.   I need an affordable (max +- € 400) headphone that sounds quite awesome.   - closed back - connectable to my ipod touch without amp - clear, well balanced sound - I listen to a lot of music but mostly...