I'm about to order my first iMac. Being on limited budget, I figure I can spend about $1750 for a new Mac. I've already decided that I want the 21" model with fusion drive. That leaves about $200 to spend on either the RAM upgrade OR upgrade to higher end Mac to get faster processor and better graphics but no RAM upgrade. I'm an architect, and I plan to use Bootcamp to run Windows so I can use my windows-based CAD and 3D modeling programs (AutoCAD, Revit). I also do some light photo & video editing and play a few games (I love Company of Heroes). What is the advice of the community on how to spend that extra $200: Ram upgrade or hi-end 21" Mac upgrade? Thanks.