Pretty much everything Koss is worth your money, no matter which you buy because they have a lifetime no-questions-asked warranty. I have the Titanium ones that are around $150 I use for audio mixing the like.
I've had Senn's and they broke on me. I also had Zalman's, but eh.
Nothing short of perfect. They're also very comfortable, never hurt my ears or make them feel hot after extended use like similarly priced headphones do. Noise pollution is kept to a minimal as well. Nobody can hear what I listen to and I can't hear what's going on around me when I'm using them.
You can buy them refurbished for less than $50, but in terms of quality they sound and feel like a pair you would pay over $200 for.