I haven't ordered yet, but I'm considering replacing my early 2006, 1st-generation Intel Core Duo iMac with the new 2012 21.5" iMac, with a 2.9 GHz i5, Fusion drive and 16 GB RAM. I'd really like to hear about the experiences of those who've already gotten one. How's the screen? How does it perform, and under what kinds of loads? Is it quiet? Are you pleased with it? Thanks in advance for any replies.