Using PC as a Blu-Ray Player

[audioxtremist]

I have a selection of Blu-ray concerts which I play in 2-channel. I also have a DAC which I am using for playing the Blu-rays. Currently I have a Gen. 1 PS3 which connects to the DAC via optical connection. However, I have noticed that the optical connection does not sound as good as the coax connection, at least in my setup. So I am looking at a way to connect to my DAC via coax instead of optical for Blu-ray concerts. I have an HTPC with an Asus Essence STX sound card which connects to the DAC via coax so I was thinking of buying a blu-ray drive for the HTPC. Would this produce high quality 2-ch audio? What are your experiences with a PC as a 2-ch blu-ray player. Am I better off buying a blu-ray player with Coax output? I can pick up a BD-ROM for $80 or a Blu-ray player for $80, so it comes down to which sounds the best really.