Okay, update: 1616m installed and so far is working great! More testing is needed to be certain, but so far it's running great as a 5.1 windows soundcard and as an ASIO card with Sonar. The only hurdle I ran into was not understanding that I couldn't create a session in Patchmix that would allow both wav and ASIO to coexist.
But now that I know I need to run dedicated sessions for the purpose I'm using the card for, everything is running SWEET! :)