I live in an area that receives maybe 1 or 2 powercuts a year. Not a lot, but 1 or 2 too many I have a 20" iMac (Alu) and was wondering what would be the most cost effective UPS that I would need. When a powercut does occur I would just want to shut it down (or have the iMac do it itself). I don't want to work on during the cut. I know people recommend APC, but I was just wondering what the best one for my situation would be (I'n a complete novice at electricals - I don't know anything about how many watts it uses etc). Would this one be okay? http://www.apcc.com/resource/include/techspec_index.cfm?base_sku=BE400-UK&total_watts=200 With this UPS would it be as simple as just plugging the iMac into the plug socket and off it goes? Would I have to do any configuring with the iMac/UPS? Thank you!