"She would only be using it for Internet, watching movies etc - nothing taxing."
For that the specs are actually absurdly overkill. My, by now, pretty old spec system built some 6 years ago, can do those tasks standing on it's head.
Anything you can buy these days will do what you want and more. The only thing you might want to think about is actually the screen size.
These 15.something wide screen systems are actually quite small when you're used to an everyday 19" screen. That's the only thing I would suggest you might spend more on - but then you have to balance that with portability.
As a different approach, why not think about a smaller and more portable notebook, and an external larger (19" or higher) monitor for "at home" use.
Also bear in mind you should be looking to get an external drive for backups with ANY system (£50 ish).
A few months back I bought a 15,5 inch lenove (lower specs than the medion), which would also do her jobs with ease, and only cost €298 (about £275) in Spain. Has camera, mic, camera card slot too.