I have the CyberPower unit that you linked to. I bought it when NewEgg was running it for $139 + free shipping. I was a bit hesitant when I ordered it, but the deal was too good. As it turns out, it works great. It is hooked to my WHS, and was instantly recognized which, as stranger89 pointed out, hasn't always been the case with CyberPower. It is also pretty quiet. If you dig deep into their literature, you'll notice that newer models, like the LCD series, say something about having a HID compliant usb port that works with built in features of Windows, where other models don't. Something to that effect. While I haven't pushed all the way to it's limit, it will power my WHS for more than an hour and a half.