I've had mine for about two years and up untill a few months ago it was some real smoooth sailing..... Then for some reason it just decided to go nutz one day. Blue screen / globe / question mark / fan noises.....the whole nine. So anywho after taking it to the mac store and having it tested I was told it was time for a new Hard drive. I'm looking for something nice maybe in the 2$-4$ hundred range. But i don't know a thing when it comes to macs', this is the first time i've had to build upon the stock design. Can someone help out a struggling n00b? thanks.