Anybody using heavy duty battery backup with surge protection on their Macpro? On my last desktop, I had it hooked up to an (expensive) APC that would power my 20" CRT monitor, external drive and computer for up to 30 minutes in case of power failure. I remember paying around $300 for it. Over the years I used the setup it only came in handy only once during a power failure. However, aside from the power outage protection, I did notice that every once and awhile it would make a "clicking" sound to indictate the battery power was kicking in briefly. I'm not positive but I think it was balancing out powersurges and brownouts? Aside from data protection during power outages, do you think the heavy duty battery backups are worth the money? If so, what backup do you recommend for the MacPro? What about the simple powerstrip surge protectors? Do you think they are adequate for protect against sudden power spikes? Thanks!