Creative playdock i-500 is light and strong.
And if you can find a Harman Kardon Go and Play anywhere in your budget I'd go for that one, Bose doesn't really suck that bad but there are better systems for the money.
The Lenco IPD 5100 also is a good bang for the money and so are all of the Logitech ones.
Just go look around, think about the prices and chose what you think suits you. And please tell us what you bought because I am curious.