Desktop PC speakers don't have to be cheap little plastic things. Sanwa Supply's new MM-SPWD5 is a pair of 2-channel, 3-inch 14W speakers in 18-cm high wood cabinets. In front are a headphone jack, microphone jack, and separate controls for tweaking high- and low-frequency output. In back is a stereo mini plug input, letting you play sound from an external device (like audio player) while staying connected to your PC's audio output. The power unit is contained inside, so there's no huge AC adapter to litter the floor. JPY8820 from late September.
More info (Japanese):
http://www.sanwa.co.jp/news/200809/mm-spwd5/index.html