Having always used a PC I have recently bought a 27 inch screen iMac. Hence I need new software--Lightroom 3 and Adobe Photoshop CS5. The student discount is a great help. I must admit I am a bit apprehensive about starting to use the Mac for processing , another challenge for me along with the coursework. I have got to look at calibration too. I am ashamed to admit I do not have a calibrated screen on my PC, my prints , (after a lot of trial, expense and error !!) are now fine but I really feel I now need to take a more professional approach.