i have the same problem when i try to start my mac it stucks when the gray screen comes i took it to the mac shop he told me u need to change ur hard drive ??

the macbook is just 7 month old and already the the hardrive is damged i think apple uses cheap parts!!!
there is a website can buy a hardrive nad change it?? this is the website
2.5" laptop hard drives - SATA, IDE, ATA Internal for MacBooks, PowerBooks, iBooks, and PC Laptop and NoteBook systems at OtherWorldComputing.com
which 1 i ned to choose for a macbook ?? what is the best brand ?
i need ur help ASAP i need to order!!
cheers!