I'm looking at getting a 15" rMBP. For those of you who have it, what is the performance like while working in FCP X and Photoshop CC? I'm definitely going retina since I'm hooked on the display! Also, I know that it gets jittery in safari and a couple other apps. If I plug in external displays to it, will I get jittery performance on those as well? Conflicted because I know new models are coming most likely in October; however I need this soon for work purposes. Last thing: are the February 2013 models having fewer issues (I.e. image retention) than the 2012 models? Thanks for the feedback!!