Given that the XBA4iP is so close in price on Amazon right now, would you recommended them instead, or do you think the large size of them would cause more problems?

Any ideas, anyone?

My Sennheisers CX870s are very good (as far as I can tell), but I only really get the best out of them when I’m in a dead quiet room. When I’m walking to and from Uni, along the side of a within town road, the sound cancelling is good, but the quality drops. I can’t tell if this is because I’m...