I’ve had a couple of pairs of Shure ‘phones (the first set I lost… d’oh).
I find that the whole cable-over-the-ear thing works really well for me; if you use the little adjuster sleeve thing to tighten them up at the base of your skull they don’t move at all, making them really good to wear in the gym/whilst running. I use mine with the foam sleeves (as per blaggers) and they are both comfy to wear and excellent at sound isolation. I regularly fly long-haul on business and can wear my in-ear ‘phones in far greater comfort than any of the over the ear type. They also do a great job of sealing out background engine / cabin noise.
EDIT: Oh, the sound quality is good also 😉