Hey guys, I'm currently using a 2009 Mac Pro tower with a 27" Cinema display and a MBP Retina for all my photography work. Interested in the iMac mainly for the Retina display but also for the streamlined body. As of not I'm in no rush for a new computer since I'm already well covered. But I will eventually get the iMac Retina since a dedicated Mac Pro plus a high end 4K monitor will cost significantly more. So the question is when is the next iMac Retina update and what kind of improvement are speculated? Also what are issues with the current iMac R? Thanks!