>So I went to Headroom and checked out those phones. I'm concerned
>about comfort and their ability to stay in my ears. Those are the
>primary reasons i prefer the other kind (vertical). How is fit and
>comfort level? i move around a lot (runner), so they have to stay
They are very comfortable, and to be honest, I've even played casual basketball with them a couple of times
-- this wasn't a full-out game, but still, they didn't fall off. My girlfriend wears them running all the time.
But, again, avoid the KSC-50. They WILL fall off. They are heavier and they don't fit as well. That's also the reason I would avoid the KSC-55 -- I don't think they'll be as snug.