Please please help me pull the trigger! I don't have money to blow, need a new computer and have never bought a MAC, but cannot wait to own one. I've read tons of posts and don't feel confident making a decision re: which iMac to get without input from others. I would truly appreciate any input. I will be doing a lot with photos/photoshop, and basic editing of videos from iphone. I'm leaning towards 27" bc I can upgrade RAM and to Fusion/SSD in future if need be. Or, will 21.5 suit me with 16gb RAM and Fusion drive included. I'm looking at the following refurbished iMacs and am on a budget, and am open to any other suggestions: Refurbished 27-inch iMac 3.2GHz quad-core Intel Core i5 Originally released September 2013 27-inch (diagonal) LED-backlit display with IPS technology; 2560-by-1440 resolution 8GB memory 1TB hard drive1 NVIDIA GeForce GT 755M graphics processor with 1GB of GDDR5 memory Built-in FaceTime HD camera $1529.00 OR Refurbished 21.5-inch iMac 2.9GHz quad-core Intel Core i5 Originally released October 2012 21.5-inch LED-backlit glossy widescreen display 16GB memory 1TB Fusion drive NVIDIA GeForce GT 650M with 512MB Built-in FaceTime HD camera $1569.