I'm thinking of buying a new 21.5" iMac (refurb or wait for refresh) and hook it up to only use my 2009 27" iMac display. I could put the 21.5" on the floor like a regular desktop, or take off the stand and lay it glass-down in my desk's keyboard tray (sturdy with air flow). The alternatives would be to replace with a new 27", or buy a future 2012 mid-/high-level Mac Mini; but I figure even without using the display, a base 21.5" is a better value than the $800 or $1000 Minis. Would this be a good way to save $500, or is that just stupid? I am an average user (Chrome, iTunes, & Netflix/Hulu).