At Computers4Sure.com I noticed several different models of the Hauppauge Win-TV PCI card. One sells for around $128 and states it is cable ready and provides Dolby Pro Logic surround sound. A cheaper model sells for about $90 and says it just offers stereo sound. Now, since Dolby Pro Logic is really just the surround and center and subwoofer channels decoded from stereo sound, why is there any reason to buy a more expensive card if you have an SB Live! Platinum 5.1 or Stereo system which performs Dolby Pro Logic decoding? Any suggestions would be helpful.