Yamaha PDX-11, not sure about the sound quality since it only has two speakers, a 4-inch woofer and a tweeter. I imagine this speaker combination providing a bunch of bass and a bunch of treble. With that said, I haven't tried the Yamaha PDX-11 yet, and oddly enough there aren't any reviews on Amazon.
The Yamaha PDX-11 Portable Speaker System does look pretty darn cool though, your choice of colors, a rugged design, an iPod/iPhone dock, a 3.5mm audio jack, and the ability to run off of wall power or six AA batteries (which will provide about 8 hours of playback). Yours for about $99.95 here.