Personally, I would go with the Klipsch. I have both of them set up where I work, and I prefer the Klipsch for everything except the lower end. They are also more versatile, since they accept 1/8" minijack input. The SoundSticks are USB-only, AFAIK, so you wouldn't be able to, say, hook up a friend's iPod for a listen.
What price can you get for each of them?