Greetings, My late '09 27" iMac has been very sluggish lately. Currently running Mavericks. It got to a point where upon startup I was getting endless beach balls whenever I tried to do anything so I restarted in Safe Mode and ran Disk Utility. It indicates that my HD "has a hardware problem that can't be repaired". And S.M.A.R.T. Status Is "Failing". I ran Disk Warrior and I get the same general message. Running Repair Permissions seemed to help as now the beach balls aren't as prevalent. Assuming that it's an option, is it worth it to install a new hard drive or just get a new machine? If a new hard drive is an option, what is a good hard drive to get (I'm not technically inclined so I'll likely ask the Genius Bar to do this for me).