I just ordered my first iMac (27 inch C2D) after using Windows my whole life. I would like to know if people with a little more spec experience could help me figure out if I made the right choice or if I should switch to i5 or i7 if it's still possible. I will mainly use it for graphic design work using CS4, no video or music editing or gaming. I plan on upgrading to a newer computer after about 2 years (unless it doesn't die within that timeframe like all my Windows laptops have). Will a Core 2 Duo be enough until then or should I go for quad core? I'd really appreciate your advice.