A person who works on graphics or video, and has any idea about hardward should know that this thing is going to be limited in graphic capacity because it's a pissy little GPU inside that case... compared to a high end first person shooter gaming rig for example.
How you going to fit stuff like this:
In a toy (more interested in style than function) like that?
If she is used to mac os then I think you can install Mac os on a gaming rig. Gaming rigs whilst expensive, are now more bang for buck than 10-20 years ago because they are more popular, and the market is saturated with options. 6k was in budget?