I am going to buy a new hard disk drive for my Macbook on newegg.com. I've been looking for different sizes and I've decided to buy a refurbished Western Digital Scorpio Blue w/320 GB ($54). It is cheaper than the WD Scorpio Blue 250 GB ($65), but I looked to the reviews and they're not so good for the refurbished one. Does it worth the save of 11 bucks (and more space)? Has anyone tried the refurbished WD? Is it reliable?