If you can find a UPS that will support running all connected equipment [they have wattage capacities usually printed on them, if not in the model #], do so. UPS systems, as Butch notes, protect well in most ways, especially voltage regulation.

The downside is, they're often expensive for the units capable of handling amps and projectors [wattage, as above]. Moreover, most [except very pricey units] don't have sequential on/off for your equipment, and don't protect secondary strike sources [cable, phone]. If you're OK with this, the unit you're looking at ought to serve well.