Second the 590 recommendation. They're really, really comfy and light, and do not get tiresome at all with long listening sessions as some of the leather-padded headphones can. Also, they're
ideal for trance, with strong, punchy bass and detailed treble. They won't work as well with pop, but if you're listening to them off a radio, then it frankly doesn't matter much what you listen with, since a radio isn't exactly a hi-fi source.
Alternatively, consider the Beyer DT 770/80. They're heavy, but the pads are nice and fluffy, and they'll be fairly comfy too (though not as nice as the 590). They're built like tanks, and are also very good for trance, assuming you don't have a problem with sharp, piercing treble, which unfortunately these also have. They're considered by many to be the bassiest cans out there (except the mighty PS-1, but that's in a wholly different price range
).
[Edit: where did I get the whole "radio" deal? see cat, too much studying is bad for you
]