Thanks guys that was a big help to me .

I think I'll look for the Cyberpower 1500AVR then. The APC ones are too expensive for me.. and I don't plan in having to rely on the UPS for extended periods. It's more for surge protection when storms hit or the power gets cut.

By the way in the future when perhaps a 1000W+ PSU will be needed, is it enough to have a 1500VA UPS? I'd guess since the 1500VA UPS are 900W it wouldn't be enough, but if the system only uses near 1000W at peak, then on idle I'd guess it'd be more than enough, am I correct?

If not those 1000W+ UPS (from APC) are so expensive, I hope that when the time comes they drop those prices