P.S. I need this before Christmas.
What's your budget?
Do you want bright treble, or normal treble?
Do you want some extra bass, or gobs of extra bass? Or do you want it to be fairly neutral but capable?
Does it need to be closed back or do you want open air?
What will you be plugging these into to listen?
For home use or portable use?
Short answer: If your budget is unlimited, you want the Ultrasone Signature DJ. If your budget is around $300, you want the V-Moda M-100.
Since the Ultrasone Signature DJ is $1,000 and it sounds like bass along with overall sound quality is important to and you want something portable, I give my highest recommendation for the M-100 based on your needs and budget. V-Moda has a 60-day return if you don't like them. You should also check out that thread for more feedback.
The Logitech would probably leak the least, but by a small margin.