I am doing a report for a college writing course where I have to compare three products, and I am comparing these three models of headphones.  I am also considering buying one, when I save some money.  However, I don't know a whole lot about headphones, so I thought I'd ask you guys.   How do...

I'd like some help picking some headphones within my budget.  I have been doing research on Google, and each time this site has had the best information I have found, so I thought I would ask you directly.   I'm looking for headphones in the $50 USD ballpark.  I can go a little higher...