I have two recommendations.
The
Sony V600s sound good, are comfortable and fold up (more important to us using them on location than someone using them at home I'm sure).
The AKG 240 series has been very popular in recording studios for years and their
AKG 240S sets are the least expensive in that line. They're extremely comfortable and light (though they don't look like they would be light!).
Both of these will isolate you more than most and will help you to remain pretty quiet to others in the room. I linked to Amazon to give you a good overview, not because they necessarily offer the lowest prices.
