Hello people, I'll be getting a new iMac to do webdesign work within an IT department. I was wondering is getting an external HDD and using Time Machine really worth it? I don't want an extra noisy HDD on my desk and I don't want Time Machine to tax my system all the time. What is the real use of Time Machine? To me, it just seems like huge garabe can that I can go in to get something that I deleted. Can I use it to restore my system and data if it fails? Any thoughts or opinions would be helpful. I need to turn in a quote by the end of the week. Thanks.