Very interesting headphones from Takstar, quite cheap (<$60 shipped, usually).

Mostly at Aliexpress - http://www.aliexpress.com/wholesale?SearchText=Takstar+TS-671&catId=0&manual=y

They are really big and very comfortable. Thick soft ear pads. One of the most comfortable headphones I had.

TS-671 are good example of really open headphones. They sound really airy.

From all Takstar headphones these are most involving. They kind of make most music fun to listen.

Of course, they have minuses, main being bass. I really suggest to use equalizer with them with some bass boost on your preference. They have bass, and quite deep one, but it is really recessed.

Main plus - they present music as spacious and involving (I said it again :-) ). More spacious than AKG K702 known for their sound stage.

Of course, they lack some detailing of top headphones, but I really like them.