I have always been a big fan of UPS’s (Uniteruptible Power Supplies). I have however been less then excitied by the lack of software support that manufacturers offer for the OS X operating system. It’s not crucial for a sucessful backup system but it is appreciated. There are however some companies that strive to please everyone. The first company I am going to go over has been an Apple supporter for some time now.

• Belkin’s UPSs are reasonably priced and do offer software management options for OS X. The higher end of their UPS line also sports AVR. AVR is an acronym for automatic voltage regulation. What AVR does is it essentially clean the power going to your computer so you a get a much more stable and constant supply which can extend the life of th PSU(Power Supply Unit) inside of your computer and protect valuable attached hardware.
  

  APC UPS

• APC is the industry leader when it comes to home UPSs. While they haven’t always supported the Apple OS. Almost all of thier recent products do come with power managing software. AVR again is available on the higher end models.

You can nab yourself a decent (and by descent I mean powering your Mac Pro and it’s 20″ LCD for at least 15mins) UPS for under $100 from any of the following sites: eCost, Newegg, TigerDirect, Etc.

I also recomend you check out TrippLite’s line as well.