I have had my new 20" iMac now for over a month. I am receiving e-mails from Apple with a pitch to buy Applecare which would extend phone and hardware support to 3 years. I believe the cost is $169-. What do you guys think, a good use of money, or should I assume my system will run good without hardware failures for three years. I'm debating if the purchase makes sense, but would appreciate my fellow users thoughts. Thanks all!