I have just been told by the Belgian shop where I ordered an iMac 24" 2.8Ghz that it should be available in a week or two thus after 6 wks from order. Since I have been reading concerns about screen problems I have the following questions: 1-Can I have the computer tried at the shop before I pay for it in full? 2- If I have to buy it without testing and because of problems I have to return it, will Apple Care start from the date of purchasing or from the date I have a satisfactory computer? Thanks for your advises.