CyberPower CP1000PFCLCD. Shows at 135$ on Amazon right now (forum mangles the link for whatever reason.)
Whether it is suitable or not is dependent on your power draw. For me, the smaller 850VA version is more than enough to power my FreeNAS box, my ESXi/pfSense rig, cable modem, and switch with about 40 minutes runtime. NUT recognizes it and can be set up master/slave to shut down all the boxes together.