Hey guys, I have a late 08 Intel Imac. 2.4ghz, 250gb hd. Ive been having issues with imac for a while. it started with it getting really slow and unresponsive. Then upon disc utility check, My HD has alot of problems and needed to re-install OSX. I did that and the computer had been working fine for a while. Until today! So I turned on the imac today for it to only shut down by itself during the grey startup screen. The only way the computer would turn on is by inserting the mac osx disc in and holding down c. which only gives me the option to re-install mac osx. Now leopard is being reinstalled as we speak. So what should I do guys? I know my disc is failing, however I am on budget. Would it work, if I were to buy a external HD and install the OS on that? Any cons here?