Dunno, pretty much any of those headphones could be contenders.. But if I have to throw some out, I'd say out with dt880 and k701 because I don't think they'd fit your music preference too well.
I think I'd recommend the ma900 or x1 because they are easy to drive and should sound pretty good, but really all the options are viable as they all fit your requirenments well..
Which one you'd like the most, though.. Can't say.
I'll send you a pm on a nice offer that I am not allowed to mention on this site, which could be a good option as well.
Oh thank you for the PM, that's a good price =). But why do you think the DTs and Q701s don't fit the rock music requirements? I was told they have a good treble and warm sound, this isn't good?About the other ones, something I like on the Sony and Philips is they are more supported here in my country than the other brands, so it's a plus to them. I'm going to read/what some more reviews of those, thank you.