I live in a rural environment and get fairly frequent power outages, brown outs (voltage drops), and short off/ons. Plus the occasional lightning strike on the 'phone wires.
So when I bought my Kuro G9 I invested about £100 in a UPS to protect it and the HDR. It had to be fairly beefy to support the Kuro which from memory is 450+ watts. I've never tested the USP right down to switch-off, but it will give a couple of hours of HRD only use, or several days - weeks, maybe - of standby.
I think it's a Belkin, though as I'm away from home for a few days I can't give the capacity & model number.
Other than one freeze I have never experienced any of the problems that other posters report, so maybe a clean mains supply is part of the "fix".
Paul.