For less than $200 I got my APC Back-UPS Pro 1000. PowerChute says I have 9 mins and am using 420w. That's heavy video editing, OC AMD 8320, 24" IPS monitor, 14TB of raid storage/scratch drives, my JillyJally, fans and stereo. While not under heavy load I have about 40 mins.
The Pro 1000 has AVR and though I've only had issue with a brown-out once in the last 6 months.
For the price of a single 240gb SSD I have peace of mind that my system can shut down properly and that it's protected from noise and dirt frequencies.

I can't stress enough how invaluable my UPS is to me. I have about $10,000 connected to it. $200 is nothing compared to system loss or data loss..

Silly cannot even begin to describe the person who invests a crap ton of money into hardware and doesn't protect.