You keep saying that it "doesn't hurt to be overkill"
Just buy the most expensive parts available if that's the case.
Specifying a 550w psu and a discrete GPU for media playback and Internet browsing is simply a waste of money. By the time that computer would slow down, overclocking the CPU would make essentially zero difference.
Are you sure something like a NAS and an ultra book wouldn't be preferred?
After a discussion with the family, the idea of a nas is possible, but unlikely. Our main issue with it is the space it would require, since there are 8 drives already listed, plus 4 I own, then 3 from my brothers, then God knows how many my dad has in his current rig. I know we could do a partial storage of a nas, but then that defeats the purpose, since if we store some of our drives in a nas, and some in the case, surely it would be easier to leave all of them separate.
However, we did decide we would get a 6 port nas, where we are putting 5 wd reds (4 x 2tb for each c: drive and some other important documents, and a 4tb red for our cctv system that we should be getting soon to record all video, then clean it out every month or so, did see the wd purple, so might swap out with that)
Ultra book for my grandad is impractical, as much as it would be useful, his poor eyesight and large hands make the screen size and small keyboards obsolete, thus making him have a 27 inch screen and a large keyboard much better.