I have a 2013 iMac 27' with a 3.2 GHZ Quad Core, 24 GB of ram, and 1T (7200 rpm). I have also a Macbook Pro 13-inch for stuff in the field, but am finding it not quite powerful enough for my video editing in the field (I'm a sports reporter). Today I was offered a 2015 Macbook Pro 15-inch (512 SSD, 2 GB of dedicated GDDR5 memory, and 16GB of ram) for my iMac and $600. From the looks of it, good condition and I would probably go buy Apple Care right away. To note, I would also sell my 13' at my early time possible.