My MBP is getting old and I'm starting to do more video work. Looking at an iMac 5k. From what I've read in reviews this one should be okay with editing 4k files but I wanted to ask those of you that have this model for your feedback. http://www.apple.com/shop/product/F...z-quad-core-intel-core-i5-with-retina-display I will add ram and switch the fusion drive to a ssd. Thanks.