Can anyone recommend an inexpensive UPS that would be suitable for the power load of a mac pro with 4 hard drives? I was told by a salesman that I needed at least a 1500 watt UPS to support a Mac Pro, and the prices were about £200. They suggested and APC Back model 1500. This seems excessive for a home user who just wants to be able to shut down the computer if there is a blackout. I suppose that a feature that would automatically do a shut down in case I wasn't at the computer would be useful too. Thanks for any advice.