I need a imac. I am so pleased that Apple have put Quad Core processors in to their new imacs, I am some confusion is that Should I go for the i5 or i7? My major use will be the normal internet, email, word processing and HD Video editing and ultimately music production using logic. I also able to put aside $550 going with the i5, so that pretty much preserved the deal for me. For most people I am expecting the difference is not as large, but I was clever to get a reduction from buying a stock configuration. Thanks in advance for your help.