I'm looking for suggestions for headphones to be used at work.  I love my LCD-2 headphones, but they leak to much sound and are not isolated enough to be used at work.  I listen to hip hop, rock, electronica mostly.  I enjoy headphones with bass impact, and a slightly warm signature, but with...

I'm looking for suggestions on a good desktop amps to drive my Audeze LCD-2's.  I will be using a Macbook Pro, Ipod Classic, Onkyo SR-876, and an Andriod phone as sources.  I would like to stay under $500.  I have heard the HiFiMAN EF-5 was a good budget amp, but thought I'd post to see if...