I've been planning on a new Mac Pro, but many of the reviews are less than stellar. I'm debating getting a 2013 refurb iMac for half the price. That could last me a couple of years until the new Mac Pro are in future versions and maybe more software companies have optimized their apps for two GPUs. Are any of you using Lightroom, Premiere CC, Logic X, or After Effects on a souped up 2013 iMac? I only shoot HD now, so 4K won't be a factor for at least a year or two. How do those programs run and do you think there would be a huge difference between that and a 6-core Mac Pro? I appreciate the help. It is seriously half the price, which is substantial.