Monster Cable is the very definition of overkill.

I've had good experience with APC. I'm not sure exactly how big a battery you'll need but I have an ES 725. With some price shopping I found it for about $65, and keeps my PC, cable modem, wireless router, and monitor running for about 15 mins.
I guess the only thing to note, which I didn't know at first, is that only half of the sockets have battery powered backup. So you have to prioritize your equipment so that the "essentials" are plugged into those (i.e. TV, Wii, DVD Player). Whichever unit you buy, check to make sure it has enough battery-powered sockets for the must-use equipment.