I am considering buying an iMac been a Windows user for years but I have concerns. At this point and time I am most likely going to have to buy a used one with no warranty. I like the iMac 21.5 it just has the draw back of not having a DVD drive. I am looking at an iMac24 (late 2009). What kind of service has anyone gotten out of the 24? Has anyone had an overheating issue? HDD issues? I cannot get Applecare if I buy used that is one drawback. I guess my main question is the iMac24 dependable? Thanks in advance.