Headphones. Sennheiser. Which ones?

As you may guess, working in a remote space station orbiting the ocean can be a tad cramped. I’m looking for a comfortable pair of headphones I can wear all day whilst my coworkers yack to each other with me in the middle.

I was all set on a pair of Sennheiser open air headphones (like the HD-555)—I love how comfortable they are to wear. The only thing is, the open air headphones let in too much outside noise, so I still get distracted (I test-drove Tim’s HD-590’s).

Ben’s Ministry of Sound cans, (closed-ear or whatever you call it)—but they were annoying with my glasses. I’m actually eying the HD-280’s because people say they’re huge in size (which would be great for me). Any experience on the comfort here?

Finally, the best results I got for noise reduction were my crappy earbuds—but they’re super annoying to wear for long periods of time.

No, I don’t want noise cancelling headphones. It tires out my ears, and I don’t have enough low-freq background noise to really make them useful.