Thanks for the suggestions, and i have one more question: how do the CAL!s perform in the low frequencies with fast techno and and electronica, from what i read they don't do so well unelss they are amped, am i right? Also, do you think the sony's and K81's will suffice with fast low low frequency music?
I don't think the CAL! really need amping, as they're consumer-oriented, though they may improve with amping. I imagine they'll work pretty well with techno and electronica, but beyond that, you'll have to ask someone who's heard them. The K81s might also work, but my impression of the XB500s was that they felt a little slow.
I was just about to go for the XB500's, but they are out of stock locally, so i am looking at the CAL!'s, i wanted to know from someone who has listened to the CAL!'s if they do well for low freq fast paced music?