Well I listen to mostly anything.  I tend to be around rock and whatnot more, but as of late I have been listening to more techno (Dubstep, hardstyle, etc.) Mostly out of my Ipod Touch First Gen.  Assuming that is what you mean by sources.  I would prefer something in ear, as I will be using...

Hey guys, I just broke my pair of Sonys, so I was wondering what you'd recommend for a nice pair of headphones under 70 dollars.  I'm willing to buy used, I just want something that sounds good.  Thanks all!