Was hoping for some advice. I have a 24 inch iMac that I bought in Oct 2007. I've been having trouble with it for months. I get the spinning beach ball many times per day & have to shut it down with the power button or it will spin for hours. The last couple of times I booted I got a file folder with a ? Or a circle with a line thru it instead of the apple. I talked to a tech today & he thinks it's the hard drive. It will cost me $533 to replace the drive (parts & labor). Is it worth it? If it were yours, would you do it? Maybe I can sell it to someone who's comfortable replacing the drive. I just don't know what to do. I would appreciate your thoughts. Thanks in advance.