wine users - Oct 2008 - using ALSA with a USB device?? Is this possible?

I run Dragon NaturallySpeaking 10. I want to be able to use a USB microphone
with alsa but am unable to do so. My iMic USB soundcard requires that I run
winecfg and set audio to OSS.

Here's my dilemma. 
The USB mic gives me better sound. (DNS accuracy settings on average 3 points
higher, which is significant.)
Alsa gives me better latency. (Or maybe something else, but I think it's
latency. Recognition is faster, which makes it more accurate.)

I would love to be able to use a USB mike with alsa. Is this possible?
Does my choice of an iMic USB device have anything to do with it? Would I be
better off with m-audio's transit?

Thanks,
Susan Cragin