Low impedance ... use 'on-the-go' for 'workout's and 'adventure', even from your smartphone. What's the problem what that? 

The smell will go away in around a month, no worries! I like the smell tho actually ROFL

  Regarding your edit - that's exactly what I thought! If you use more versatile equalisers instead of the simple treble booster, such as an independent equaliser app or computer program, I assure you that they sound really, really good for the money. The drivers are super versatile. If only...

If the K545 are similar to the K550, then I would urge you to try them all first before buying them. As much as I love my K550, I don't think I would be happy with them if I listened on the go.    On the go, I'd opt for a more 'fun' sound than the whole analytical, flat, 'reference' signature...

I badly want the HD650 as kind of an end-game setup for some time to come ... And you are considering it for an intro headphone. Lucky! 

How did you make an O2 stack like that? I don't get it! And I love the 90 degree jack for the power switch! 

  The small earcups are what put me off getting the Momentums. Totally agree with you on that.        Dude they're soooooo nice! Like the post above asks, are there any audible differences? Very nice work done I don't see any trace of work done on it at all - it's like it was designed...

That is such a bargain ... I bought it at almost full price like a year ago.   Again, do try out EQing on this earphone. It works really well. 

I'm pretty sure it's just the different photos ... there are no different colors offered ... 

ratinox vs michaelios rofl Imma enjoy this one 

And why are you so sure? lol.      It's just the photographs. The only different colourway is the K551! No worries!

Thanks for sharing. I disagree about the weight and fit; they sure do have a 'pillow on my ears' effect for me. I consider them to be very, very light for the build quality offered. In fact, the first impression I had for them when I took them out of the box was how light they are compared to...

hahhahaha so true  and now 2014! 

For cans like the K550, you have to test them extensively with your own song list and some time for you to digest it. For the £109 I paid for it on amazon, they are definitely very much worth it. The detail and accuracy ... it's worth losing a bit of in-ur-face bass for the clarity and the...

lol ... some of us love the K550, some of us hate it; let's leave it at that and call it a day.   I love it XD