Asio4all with Emmlabs DAC2

Thank you very much!!!
Looks like this driver supports 24bit!
And I'll test with Windows 7 also.

In most cases if the card's driver supports Vista it will support Win 7.
Here's another ASIO driver you can try, though it's not free it works well USB-AUDIO

Yes, I'm going to do it.
I've just bought Lynx AES16 XLR and want to compare with USB.
I'm using JRiver, but with XP.
As I know Lynx has Asio drivers, so it will be also bit perfect.
I'm not moving to Windows 7 because I'm not sure if Lynx has drivers for Windows 7 and EmmLabs USB works with new OS.

What type of OS are you using for your Music server? Move to
Windows 7, buy a hi grade audio card with SPDIF output
supporting at least 24/192 or better output. Use a Media
player that supports WASAPI. This way you'll know you're
getting bit perfect playback.