Hi there. I'm looking to purchase an APC battery backup to protect my loverly 20 inch iMac G5. I'm looking for the right model. APC has a nifty tool to find the correct model, and they say, The question is, what is the power draw of the iMac, and what would be a safe model of APC to get (in terms of VA) Here's their product listing. http://apc.com/products/category.cfm?id=13&subid=5 Thanks!