I see, well I think, I'll just go for PX 200-II, from my experience, I get used to stuff very often.
Currently for like half year, I'm using 12" netbook. some cheap USB sound card, and a Nokia headset..that's hardcore !!, but I just couldn't afford anything, after I moved to a new apartment, so in the end, if I wouldn't get used to 200's sound, I'll sell it, and get the 100's (I used to have MK1 of those, but back then, I didn't need isolation, also PX200 was really suck, but my taste in music changed a lot, also my knowledge of sound).