For a small dorm room, the M3ti's may be a better choice than the M2i's. The M2i's will need a subwoofer. Without one, they'll sound very lacking in depth. They'll be clean and clear for sure, but your son/daughter I'm sure will miss the low end.

The M3ti's in a small room can get away without a sub. It's still not going to go all that low without a sub, but it's the "small room - no sub" speaker of choice.