Grado MS1? Do you mean the Alessandro MS1? (i.e. the tweaked Grados) I have a pair of them, with a more comfortable set of pads on, and they are not uncomfortable at all to wear, although I always imagine that the larger closed cup Sennheiser design would be snugglier on the ear. I think my MS1s are better for music than movies, they are bright and sharp and I think maybe a bit too much so for movies, but that is down to personal opinion of course. I think that they're fine. And they're also plenty loud enough imo. The other major difference would be that the MS1s will leak sound like anything, i.e. if you don't want to disturb people around then don't get the MS1.