Audio Technica ATH-M50
Makes listening to ANYTHING an experience, as long as the source isn't some low quality crap. I compared them to my cousin's Beats headphones and it just isn't fair for him tbh. I've had them for like 2+ years though (they still look as if they were new, build quality is amazing), so I'm looking to upgrade soon.
I use the Skull Candy 50/50 earbuds for when I'm around though (I don't like carrying those big ass headphones everywhere)
I think I got them for like, $20 or so but they were on clearance at the time.
They sound VERY good and have nice bass considering their price.