I was wondering if anyone could recommend a good pair of headphones for around $50 or less. I'd like them to be the kind that wraps around your ear (ear sits inside). They also need to fold-up in some fasion to make them easy to carry around. I just want something decent to listen to my portable cd/mp3 player while between classes at school. I found these Sennheiser PX-200 for less than $30 after rebate, but I can't tell if they are the kind where your ears rest inside them?