need comfortable, closed headphones for wearing all day at work (<$50)

[Pollux]

I need a pair of headphones for listening to pandora/last.fm at work. They need to be closed with good isolation (don't want to annoy coworkers) and must be comfortable enough to wear all day. Needs to be <$50.

What do you recommend?

 

[miloxo]

maybe jvc RX700's?
$33.99 on buy.com