Thinking of upgrading from a 2010 Macbook Air with a C2D, SSD, 4GB of ram to a riMac with i7, 32GB RAM, 512GB SSD and M295X. Not really worried about money. My concern is the current Retina iMac is a "proof of concept". I don't know which way to think. On one hand I read the forums and I see many picky people on here (soft buttons on iPhone, light bleeds, yellow iPad screens), basically whom I feel are making mountains out of mole hills. When I see stutter issues, graphics issues, etc., I wonder is it the user or the machine? I would drop $3200, hoping for it to last 3-4 years. My Air is beach-balling like crazy and I've wanted an iMac for almost 3 years now. I would edit RAW photos, browse the internet, play lightweight games on Windows like Southpark and Roller-coaster tycoon, slap together some iMovies, and do my taxes. Those with an riMac, think I will notice the issues mentioned within the forum; or is the lag coming from "finicky" people working with 5K movies, while multitasking in AutoCAD, and calculating data from CERN at the same time?