I’m looking to get a iMac for a furniture design studio, we use rhino and the adobe suite. I’m confused as which type of iMac to get, we are buying ourselves so we can’t afford to spend a lot of money. We were looking into the early 2011 iMac but that has a AMD Radeon HD 6750M 512 MB which isn’t compatible with rhino 6. What AMD graphics cards are compatible and what iMacs have them???