Altec Lansing FX5051
This famous name is differentiating its 5.1 rig from Creative's and Logitech's by giving it a USB as well as analogue input.
The advantage of USB is that you don't need a 5.1 sound card for six-channel surround sound.
If you already have a decent multichannel sound card installed in your PC - which many of you surely will - using a USB input seems to offer no noticeable advantage in terms of sound quality.
5.1 sound without a 5.1 sound card
No sound advantage from USB
A high-quality 5.1 system that provides a good solution for those with non-5.1 hardware
Dolby Digital 5.1
80 x 177 x 58
3.5mm Headphone Jack USB 2.0
Total power output