[akatsuki]

Taking a flight on Thursday and need some closed headphones for my son. My daughter has adopted my old Audio Technica M50s and I would like to get him something with decent quality. 
 
Audio Technica M20x
Audio Technica M30x
Gemini SJ HSR-1000
 
Key criteria - closed, no amp required, must be overnightable to me by tomorrow (e.g., I need answers fast!)

 

[KG Jag]

The Creative Aurvana Live! (CAL!)--great can if you are OK with a light build.  Amazon has them.  See:
 
http://www.innerfidelity.com/content/creative-aurvana-live-classic-reincarnate

 

[Me x3]

Can't go wrong with Gemini HSR-1000 (or Takstar Pro 80 - same headphone + a nice case)

 

[cel4145]

In case you don't get anything overnighted to you, do you have a local Guitar Center? They typically have quite a few headphones.