Nice system, homeboy! I've been into PC-based playback for a few years now, and I use it as an adjunct to playing shiny discs on my Oppo BDP-93. I fully agree with you, the sound quality that is available via 24 bit, 96/192 kHz is astonishing.
And when you factor in the incredible dynamic range and extended frequency response - far exceeding that available with vinyl playback - as well as the vanishingly low noise floor and absolutely "black" inter-track silence, it all adds up to what I find to be a very enjoyable experience.
BTW, it may be that you prefer TOSLINK because of its absolute rejection of RFI-induced gremlins, unlike the antenna that is a coax cable.
Anyway, keep on plugging away with new additions to your digital library, there is more and more quality music to be found with each passing day...
-RW-