I work on a 27” iMac since last summer and love it. Since Iʼm usually only working when Iʼm in the studio, itʼs really nice to have such great hardware. Itʼs lightning fast, because it has a SSD and fast memory etc. I donʼt know much about it, but Iʼm really happy with its performance. I use a Wacom Intuos 4 as mouse and a Moleskine or some other notebook to write or sketch down some ideas. Most of the stuff I make is done in Illustrator and Photoshop.