A few months ago, I posted about my plans to buy a new iMac around Christmas. Well, that time is just about here. I'm only trying to decide whether to buy an iMac this week or wait until Apple might unveil a new model. According to Mac Rumors, if one follows Apple's iMac unveilings over the past few years, a new one should be due by the end of Janury. Meanwhile, whether I buy now or later, I am interested in calibrating the monitor on my new machine. Does anyone have any advice on what hardware or software to buy... and how to use it?Advertisement EDIT: I must apologize... I typoed (or had a mental misfire) in the headline for this post. Let me be clear: I am talking about the iMac, not the iPad. I can't change the headline... or can I?