i have been using the 800VA dual-battery microtek UPS for my PC for the past 1 year or more. had got it for 2-2.5k i think. have an APC UPS too (1.1kVA), being used with my TV and multimedia devices. the following is my PC's config:
i7 2600k
asus p8z68 v-pro
gskill ripjaws x 8GB DDR3 RAM
MSI GTX580 Lightning III 1.5GB
corsair tx850 v2
2 dvd burners
a fan controller
HAFX
a 24" benq monitor
edifier da5000 pro speakers
canon MP287 AIO printer
plus, an xbox 360 console hooked to the same UPS