Hi guys, Kinda new here, so forgive me if this has already been discussed before (I suspect that it may have). I am planning to buy a used current-gen (2011) iMac. In my local listings, I see that people are selling it for much less than what i was a few weeks ago. Did Apple already announce a refresh of this system for 2012? When is the next refresh scheduled for? I don't want to drop money on something only to see Apple add more goodies to the product...