I agree with MasterHoss, having a hardware decoder and 5.1 speakers on a PC is unnecessary. A software DVD player and 4.1 speakers is more than enough. The reason is when you're watching a movie in Dolby Digital on your computer, you're sitting so close to the speakers that a center channel is useless. (the 2 front speakers will emulate the center channel) Also, the software decoding is good to the point that I couldn't tell the difference from a hardware decoder.