What I paid for my new iMac is, for me, a lot of money. I got most of the add ons: i7, 780M 4mb, 16mb ram, 1TB SSD. I have a regular APC 750 battery backup & I was going to use that on my iMac. However, I have been reading that SSDs can be severely damaged by power failure. I have also read that they need pure sine wave power and "smart" battery backups. Is it true that SSDs can be significantly damaged by power outage? What exactly is the difference between pure sine wave and other forms of power? What does a Smart Battery Backup give you that a non-smart doesn't? Finally, what would you recommend? I don't want to skimp on this since I paid so much for the iMac. On the other hand, I don't want to buy protection I don't need. I was hoping to spend $200 or less... if necessary I would spend more. It would be foolish not to spend more if needed.