Hi, I'm needing to sell my current desktop PC (modest spec - AMD 8750 8-core @ 4 GHz and 8 Gb GeForce 1080). My current desktop and iMac 5K (late 2014) are similar in performance in X-Plane, with the iMac pulling slightly ahead (impressive considering the lack of video RAM, and mobile GPU). The iMac is anywhere up to ~10% faster (30 FPS vs. 25 FPS so you know what I'm talking about). I don't play AAA games, though I do high-end PC flight simming (X-Plane, DCS). Due to moving country, my new place is lacking space, and so I need to sell my old stuff and I'm thinking of getting the top spec iMac 5K (not iMac Pro). I know it's "not a gaming PC" and I've had other people say "build a gaming PC", but that isn't an option. For what I do, a Mac is great, with occasional Windows usage for work. What I'm interested in is whether the new iMac has the graphical horsepower I'm looking for? In my fight sims I can run very high detail at 4K and get good performance (40-50 FPS, no stutters or lag). If the 580 can keep up, I'll put the order in. The only reason I don't keep my current 5K is the GPU memory is a bit small, but I don't want to get a new iMac if the GPU is going to be a disappointment. Aside from the GPU and modern graphics requirements (mostly memory related), my current 5K is awesome. Does anyone run DCS or X-Plane on an iMac with the Pro 580 GPU? How do you find it?