My first iMac was the one released in May 2008. I have to say that it was just okay even though it was the maxed out model. After 4 years I felt it was struggling with what I needed it to do and I had to replace it. BUT the late 2012 model I got to replace it is still going amazingly strong. I've got no need to replace it now that my workflow no longer involves video editing. Plus I can't justify spending 2.5k+ on a desktop computer anymore.