For those who have a dual core PowerMac G5, what do you use for a battery backups? I want to get one that has enough load capacity to support a 2.3 GHz Dual Core PowerMac G5 and also a 20" Aluminum Apple Cinema Display. The one I have now just doesn't cut it at all. Its only a BackUPS 350. I live out in the sticks where brown outs and total power loss is frequent in the summer months and when stormy. I just don't want to spend $500 or whatever on a battery backups when I only needed to spend $200 for example. Thanks!