Haven't seen a thread on UPS units with "Pure Sine Wave output" yet. I was looking at this one since my previous CyberPower seems to have provided good performance. I am running 2 TiVos and a 50 inch LG Plasma. My understanding is that Plasmas do not like brownouts, hence the UPS rather than just a battery backup. Here's the one on Amazon with the Pure Sine Wave featur: http://www.amazon.com/CyberPower-CP...7?s=electronics&ie=UTF8&qid=1309727290&sr=1-7 BTW: At my previous location, the unit would click on and off every few weeks for just a few minutes at a time. Does that mean I was experiencing a brownout?