Sonic Defender
Headphoneus Supremus
I would love to be able to advise you, but there are so many factors to consider that it is difficult. All of the headphones you mentioned sound very good, I have heard/owned a few of them on the list, but not all. I say trust your instincts and just get one and see how it works out. I think the DT 770 would be my least favourite on the list as it is not really that portable, although I used it as my portable with an E12 amp for over a year. I like the PM3 and the H7 out of the list, but that is because I know them. I would think either of those a safe bet, but only you will know from experience. The Audeze Sine sounds like an interesting option, but I have no idea what the EU price is going to be, it is $449 US without the Cipher cable.