Don't listen to the X1 users as gospel, for some reason the shutdown protocol is odd on them. A friend of mine had one, and it always freaked me out.
You don't need a pure sine wave output UPS, but one with AVR is recommended. Once the power goes out, you'll have plenty of time to shut it down correctly. The bulbs will be much happier; my house has crap power and i usually got 50% life out of my bulbs until i put an AVR UPS on it.
Of course, I'd REALLY like a diesel generator for my new house.. power goes out, and I can laugh from my air conditioned theater.