Hi, I have a late 2009 Imac I7 and want to replace it either with a retina macbook pro late 2014 or with the Imac 5K. I mainly want to use the computer for mainly photo editing (lightroom, photoshop and capture one) and sometimes for video editing (imovie or final cut). I am in a dilemma between the mentioned 2 systems as both costs almost the same. Obviously the advantage of the rmbp is portabilty whilst the Imac has a 27inch screen. Which one do you think is more suitable for my needs in terms of gpu and performance. Thanks in advance.