I have an APC S15 which has battery backup for my gear, except the power amps which pulled so much power I put them on a seperate PS Audio Duet.
The APC has been great, really cleaned up my system from the day I put it in. Like Kennyt we have terrible power, so I am very careful about how my gear is connected to power grid. We have lost 3 laptops and even worse, the computer portion of a Thermador 30" convection oven has been replaced twice in 5 years and looks like toast again now. All from power surges.