I'm a little confused. The fist one you posted a link to at the begining of the thread was a UPS. The other two appear to be just conditioners. Either of the later two will work fine. Do I think a UPS will work against brown outs and surges? Yes, There have been times when I am upstairs enjoying a movie and the power in the house goes out, all my gear stayed on and I never knew the power went out until I go downstairs to get a drink and all the lights are out
My UPS has a beep on it but I couldn't hear it because everything is in an AV closet. So YES! A hefty UPS with line conditioning will be a lifesaver. The 1500 I use has trim and boost to regulate voltage at a constant level.