PLEASE avoid Bose!
All things made by Bose sound absolutely horrible for the price or are built terribly.
Look at the Bose Triport. Those things cost between $150 and $180. They snap after months of normal use and don't even sound as good as most headphones priced more than $100 less.
Their speakers are the absolute worst in the industry.
http://intellexual.net/bose.html
If you want a little speaker set, but don't want to go with a full blown hi-fi system (you are willing to spend $500, right?), then just get yourself a set of really good PC speakers.
For a little over $100, you can get these:
http://www.newegg.com/Product/Product.aspx?Item=N82E16836121122
Just get yourself the USB charger for your iPod and the dock.
Those speakers will make the Bose Soundock sound like a $20 toy in comparison.
If you want to spend around $400 on speakers:
http://www.logitech.com/index.cfm/speakers_audio/home_pc_speakers/devices/224&cl=us,en
10" 188 watt subwoofer. Plus you can use one of the built-in sound modes to mirror the stereo sound to all of the speakers and have a nice 500 watt system filling your room with sound
And you'll have money left over to buy the universal dock and USB charger.
If you want to spend your money on a receiver and some floor standing speakers.........