I have to say I'm not too familiar with the Windows WDM drivers. How do they compare to ASIO (assuming ASIO was working correctly)?

One of the main reasons I wanted to go for ASIO is the option of listening with FX's whilst recording. Can you do this with WDM?

Is latency an issue?

I've got the "old" Creative Audigy 2ZS card, and mainly use Cubase for recording. Is WDM OK with these?

I would do almost anything to get away from ASIO