I'm considering picking up a raptor 74 or 150gb drive. I've got a reasonably fast computer but i get the impression from reviews ect. that a fast hard drive will noticeably improve everyday speed. My question is how you guys think i should set up my new drive, can i easily transfer the operating system onto the new drive, or would i need to reformat, are there any other things i should take into account before buying? Thanks for any help.