Your not alone Goran, I am in a similar position to you with my QBD76 albeit through a Macbook Pro. My only solution for dual wire is from a Lynx card in a Magma box or from a Weiss AFI 1, unless anyone knows of any cheaper alternatives.
This is not to say I am not pleased with the Chord, 24/96 files from Linn and HD Tracks are eerie in their realism and the listening room is full of veils lifted when playing common garden variety CDs.
Cheers
GrahamS