I've got a set of Creature II's, and I would recommend them for certain things, but that really highlights the problem with determining the "best" speakers in a given price range.
The creatures are excellent for detailed sound in a compact space. They're not great loudspeakers or bass-thumpers - the sub is not overpowering - and they might be inadequate if you're watching a movie from across the room. (I'll know for sure when my new imac arrives). They are however really cheap - 64$ or so on Amazon.
If space isn't issue and volume is, then perhaps something else would be best for you. Couldn't comment on the soundsticks - all I've heard are display models - but I know the logitechs are pretty beefy, as are the klipsch.
My advice would be to do some googling and read reviews from places like cnet. That way you can learn the ups-and-downs of each set and decide what's best for you.