Playing FLAC music from PC through S/PDIF to receiver - what's thebest solution?

Hi

I've ripped my CD collection to FLAC files (Free Lossless Audio Codec),
and I wonder how to get the best sound possible from the computer.

Currently i use this setup:

Computer with Windows 2003, running Winamp with FLAC plugin to play the
music. The sound card used is called something like nVIDIA MCP
SoundStorm 2 Audio, and has both analogue and S/PDIF output
(coax/optical). The receiver is a Sony STR-DE 475 (5 ch, DD/DTS support
etc.). Computer and receiver are currently connected with a cheap
standard coax S/PDIF cable.

I want the S/PDIF signal from the computer to be the best possible,
ideally, it should be the raw untouched data from the decoded FLAC file,
just like when playing an audio CD in an ordinary CD-player.

But I've heard that this is almost impossible on ordinary sound cards,
because they always resample any output to 48KHz, which is the only
sampling rate supported by the S/PDIF port. I know that the SoundBlaster
Live! does a really bad job about this resampling, and therefore, you
can install a Winamp plugin that does the job better with an improved
algorithm. But what about my nVIDIA MCP Soundstorm sound card?

--
MVH: Esben von Buchwald
http://www.sbn.as