Yeah, I think if I just wanted for portable with no noise cancelling then I'd consider the PX100 or 150's. and for just stereo probably the Grado's.

The fact that all sealed cans actually filter out some noise without needing the whole "active noise reduction" voodoo from some headphones probably makes the 280 one of my best bets. They dont look too big, but if you compare them to the 150 or in ear, then yeah they probably are huge.