My two year old MBP just gave me the universal do not enter sign at startup. I booted up with a disk, but couldn't repair the HD via disk utility. I am guessing I'll be replacing my HD. Any suggestions on how to go about doing this? I am not much of a hw replacing kind of guy, so I am guessing I'll just take it to the Apple store and see what they can do. Any ideas on cost? I could also use the local Mac Store, as it is more convenient. Anyone else gone down this road.