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How customizable are the Mac Mini's? If I bought the base model now, could I upgrade the RAM and stuff later?
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Well, they're really small, so there's not much you can add to them except RAM (wireless and bluetooth are standard), and they use only one stick, so you'd have to swap it out. The case is a little tricky to open, but the RAM is very accessible once you get the case open.
Here's a site with video tutorials:
http://eshop.macsales.com/tech_cente...directory.html