How big will be that dorm room?
I would say Bluetooth speaker or, if she insists on more, a little (almost) all-in-one system a few above have mentioned (Denon, Marantz, Yamaha). That would include powered speakers as mapman and others suggested.
More than anything, ask her to wait until she moves into her room. She may decide to forgo a turntable, real system, etc. It is wonderful planning for life in college, but reality may send her wishes elsewhere.
Also...
"I’ve tried for Christmas one year and that was a mistake. "
That was a long time ago. She is a different person now and will be even more different come this fall. Which is not to say that Apple earphones will ever fall to be her second choice.