Hi, I'm looking to buy a 27" iMac, ideally before Christmas, but I have a few questions. 1) The Buyer's Guide says that the current iMacs are mid-cycle, and an update is not too far away. By your estimates, will this be a major overhaul, or just an improvement in components? 2) I'm leaning towards the i3 as opposed to the quad core i5 - under what circumstances would one need a quad core processor? I'll primarily be using it for work (which only involves Pages and a few light PDF editing programs) and video, with a little bit of gaming on the side on occasion - will the i3 cater to these needs? 3) On the topic of games, how's the graphics card in the i3 model (ATI Radeon HD 5670, 512MB)? 4) Final thing - to raise a bit of cash, I'll be selling my MBP. How best can I ensure that no information is stored on it? I basically want it to be like it was bought in a factory, with no user information, downloaded programs, etc. Recommendations? Thanks!