Hi Everyone, I have a new unibody macbook and I plan on purchasing a 500GB or 1TB external hard drive and will be leaving it at my desk and having it hooked up through my cinema display. Any recommendations, I'm willing to spend a bit more for quality (want to stay under $200)? I heard people complain about certain drives having issues when the macbook goes to sleep. Any thoughts on this? Also, I'm a bit confused on something and would appreciate any information. If I have a 160GB internal drive and hook up a 500GB external with Time Machine, will all of that be used to back up the 160GB or can I use any of it for separate storage? If not, should I purchase a smaller, second drive? Thanks in advance for any help!