Time capsule would work, its a nice simple turnkey system w/ wireless built in. Higher priced that other options but simple. I'm not sure but I think you might be able to plug a USB hard drive into your Apple TV, or Apple TV can access music stored on a NAS or networked computer somewhere. Sending your music over wireless in itself does not degrade it in any way. The apple products have more jitter than most here would like to see, so a jitter reducer between that and your DAC would improve things greatly. I just downloaded some WAV files and had a little trouble playing them on my mac, not sure why. I converted them to loseless and it smoothed out.