A few weeks ago I bought an Altec Lansing speaker for my Acer laptop. Nice simple design, and I like the color. Why VS4121? I know this is cheap, it's just about $57 (USD) but since it is an Altec Lansing product, I believe it has a great sound quality.
This computer speaker gets a lot of good reviews on the internet. The large subwoofer size is the main concern of the people, although many say the sound quality is still inferior compared to the high-end series of Altec Lansing speakers, but with a good sound card, I'm sure the sound quality would be better. Here are some Altect Lansing VS4121 un-boxing photos: