Looking for my first Apple PC and I think I've decided on the 2012 MacMini. I'd like to pick up a refurb unit before they disappear. How long do you think Apple might have these? Will they be available closer to Christmas, or should I pick one up now if a 2012 version is important? ALso, is RefurbMe the best place to sign up for notifications? The $419 i5 and $589 i7 seems like really good prices. Thanks!