Kyrill,
You can install the components in Foobar2000 for both Kernel Streaming and WASAPI on Windows 7. The software lets you choose which interface to output to a DAC or soundcard.
When I have listened to my setup I prefer the WASAPI interface on Win7. WinXP did not have WASAPI so Kernel Streaming was better when I was using that OS.
I have no way of checking bit perfect output, but from what I have read, WASAPI is also bit perfect. It is the bit perfect feature that should make sure you are listening to the recording as made by the studio without any further signal processing.