APC has been in the computer market for a long time, and in addition to the consumer computer market we see them some on the commercial side (although we've never spec'd them for power or HVAC). I've not seen much about them for the home theater market, but my suspicion is that there reasonably good quality with the potential for a little price inflation (APC has never been a company that I think of as a price leader on the consumer side). I would expect a power conditioner with battery backup that is large enough to be of much use in a home theater to be somewhat pricey, and the prices I found in a brief search seem to agree with that (the S10 was $1300 and teh S15 was $1500).