My iMac 27 arrived today. I bought it to use mainly as my photography editing tool Config: i7 4.0 512SSD M395X 16GB My photos were taken with my Canon 6D 20MP camera and RAW images Here what I thought of it. Scrolling through images with GPU Acceleration enabled I noticed the images takes a bit to load as well as zooming also take a bit of time in Develop Module. Editing however is smooth as butter, exposure, shadows, highlights and so on are really smooth as you move the sliders. When I disable the GPU, the images loads really fast, scrolling through them is a joy, zooming also takes no time, however editing I noticed delay as you move the sliders, it's not bad, but its not as smooth as with the GPU enabled Now this is the question, which one to use? I would say, if you are editing a wedding or a shoot with lots of images and doing batch processing in which you apply same setting to a bunch of photos and need to go thorough them, disable the GPU.. if you are editing a few individual images then enable as the sliders will be really smooth while editing them There is no win win situation here, Adobe needs to fix these issues.. Now, the display is spectacular, I'm really impressed how my images looked, did not know I was taking such sharp images hahaha.. Loving this computer!! EDIT!!