I have an APC H10 and use a 52" Toshiba LCD, receiver, DVD player, and cable box and I've never seen the load light go beyond 40%.
Keep in mind that those watt figures are the MAX and in most cases they will be drawing far less, not to mention that you will not have all of the devices drawing power at the same time.
Most importantly, it's FREE.
Just get it and see how it works.
The only negative to the H10, IMO, is the incredibly bright blue leds they used for every single indicator. There are 8 dim settings but you'd be hard pressed to tell any difference between full on bright and the lowest setting. I'm thinking of selling it just for that reason...I can't stand blue leds and I wish the manufacturers would drop that stupid trend immediately.