EAX effects work under Vista with ALchemy software - available from Creative
downloads website for a year now. I use it with my X-Fi card: EAX and Vista play nicely together.
If Xonar drivers actually trick games into seeing EAX capable hardware that is not there then it is just matter of time before
someone sues ASUS. Myself I am rather tired of their rather thick
marketing claims about just anything. ASUS are so irritating and
will not see my money for long.
I just stumpled on this old flame of ASUS Xonar card. I personally bought both the Asus Xonar D2 and the Creative X-FI Titanium. I returned the Creative because I found both the HiFi quality of the Xonar and the Headphone Surround Sound emulation to be better in the Xonar.