be careful, a UPS does not put out a true sine wave voltage like the wall, it puts out a more hybrid wave. For many UPSs the power coming from your wall right now (as bad as it may be) may still be better for you electronics than to have it "filtered" by a UPS.
My protection consists of a Tripp-Lite Iso-bar that cleans the power and adds a surge suppression circuit, and then into a another surge suppressing power strip. I then of course have the power supply's filtering and APFC.
Its good enough that during lightning (insert gasp here), all the lights will flicker drastically, but the computer never flinches. During an overnight storm I've even heard the capacitors in my PSU discharging the remaining extra power coming through the line.