Both work fine without amp for ipods or zune players (I should get better music players ) Both are solid in terms of build quality. SRH440 doesn't have as much bass and is more neutral, I preferred it to the M50s. The price difference isn't that much SRH440 is about 80-100 at most places...

Thanks for all the answers you guys. I think I should definitely get the KSC75 and mod them for the perfect portable experience. @joker: your reviews for the portables and iems was amazing. Also thanks for the list of iems. i'll check them out.

i am sure some of the few thousand KSC75 threads on head-fi answered all these questions but after 25 minutes of searching i gave up. for those of you know have used these please answer me the following: 1) are they comfortable? i haven't really dealt with clipons much. i had this horrible...