I don't see a problem with using a computer UPS (as long as it's a Smart-UPS, rather than a Back-UPS). Unless you want the goodies from an AV supressor/UPS, don't spend the extra dough. Those goodies are usually sequenced outlets, a little display that glows blue and shows useless information, and a silver enclosure.

I use a Belkin computer rackmount UPS of some variety. It keeps the TiVo on and recording during a blackout, and that's about all I care about.

I am the Doctor, and THIS... is my SPOON!