My wife's windows XP computer is on the fritz, and I'm thinking about getting her a new 21.5" iMac to replace it. She's never had a Mac before, and I wonder how the transition will be for her? I also haven't had a Mac before actually, but I've ordered the new rMB and plan on getting the next gen iMac. Anyway, she's not really a computer person, so I wonder if this would be a good option for her. She also has an iPhone and iPad. Her computer work is minimal - web, email, Word, Excel, picture viewing and video watching. Is the Intel HD5000 graphics sufficient for driving the 21.5" display and viewing video without lag or stuttering? My main concern is if she's able to adapt to OS X coming from windows, or if it's going to require significant training for her? I could just get her a decent new Windows PC for about half the price, but I'd like the both of us to move to OS X. Any advice or suggestions appreciated.