Airport Express would work, but the sound wouldn't be up to your standards -I think- based on the rest of your system. And you don't own own Mac.
Really, your best bet is to go wired somehow. There are lots of possibilities! Here are links to informative manufacturer sites with information pages on computer audio to get you up to speed on available options.
If you like tubes, I wholeheartedly recommend Wavelengh Audio.
Wavelength Audio
Empirical Audio
Also, here is a really good site dedicated to computer audio run by a guy in Minneapolis, MN:
Computer Audiophile
Really, your best bet is to go wired somehow. There are lots of possibilities! Here are links to informative manufacturer sites with information pages on computer audio to get you up to speed on available options.
If you like tubes, I wholeheartedly recommend Wavelengh Audio.
Wavelength Audio
Empirical Audio
Also, here is a really good site dedicated to computer audio run by a guy in Minneapolis, MN:
Computer Audiophile