$39 Sennheiser Headphones, model SNHD202-II
Got some and like them.
(+ Wrote a whole post and lost it...)
I have some HD-202's and the plastic panel inside them presses on my ears and they hurt after about half an hour. This however was greatly improved by stuffing extra foam under the pads. It also can get a bit hot in there, i suppose the same goes for any circumaural 'phones.
However the bass on these things is great, and the sound in general, especially at the price point. I've had them for many years with a lot of use and abuse (after the foam mod) and although I did have to do a cable repair on one side, they are otherwise mint. At the same time I ran the cable for that channel around the headband so it only comes out of one side.
However my px-100's get a lot more use. Great sound (if a smidge laid-back), very adequate bass, light and comfortable. I can easily wear them all day and then they fold up into a compact carry case to come home with me.
Being open as they are you can still hear what's going on around you, and your close neighbours can hear what you're listening to, which may be an advantage in some circumstances. They also suffer less from the "boomy" character which comes with some closed phones.