My parents are getting me these for my birthday. I'd love to use the digital surround, but I don't have digital audio output. The speakers support Dolby Pro Logic II, and DTS 96/24 (96kHZ, 24-bit), through coaxial or optical inputs. Does anyone use a M-Audio Transit (which supports 96kHZ/24-bit, and can pass AC-3 and DTS through the optical port)? Or does anyone have another product that would work better?