I've got a mid 2011 27" iMac (3.1ghz i5) that is using an 120gb Samsung 850 evo external SSD for the OS and apps (very quick!). Last September year I got the video card and LCD screen replaced and took the opportunity to upgrade to a 3TB seagate internal (now storing my home directory). This is how I/we use the mac: Productivity - Office apps, Google drive, etc I'm a secondary ICT school teacher Occasional use of photoshop CC Lightroom CC to view and manage 52k images Spotify listening Viewing 4k home videos (obviously not at full 4k and they're a bit choppy...) Now the iMac is rocking along ok and performing well for most of what we use it for. There's no real reason to upgrade other than it's age and being able to view 4k videos and photos..... OK, the question... should I upgrade? Is that 5k screen worth it???