Geoff, may I suggest a hefty UPS. As we know, an Uninterruptible Power Supply is known best for what it does only very rarely -- provide backup power in the event of a total power loss, giving you enough time to do a graceful shutdown.
The REAL day-to-day benefit of a UPS is "power conditioning," boosting voltage to normal levels in the event of a brownout, and, in the event of a power surge, clipping off those dangerous instantaneous voltage spikes that can easily fry one's equipment.
Every, yes, every piece of computer and hi-fi equipment in my house is protected by a phalanx of UPS devices. The only thing that I don't have plugged in are my laser printers, which don't need to run when the power is out.
Indeed, with my routers, switches, cable modem, and a couple of fluorescent floor lamps all UPS protected, I can still communicate with the outside world when that big tree across the street falls and brings down the electrical wires -- which it did a couple of months ago. My 2TB RAID storage system also is protected.
And remember, longer UPS run times are achieved by adding auxilliary batteries to a correctly sized UPS, not by buying a unit with a needlessly high KVa rating.
