Are you looking for PCI-E or PCI? Also, do you have any preference between Dolby labs tech or Creative CMSS3D? Also, what kind of connections do you need? All 3.5mm jacks? Optical, coax, HDMI?
The Latest graphics card to come out is the Xonar Xense, and it comes with some nice headphones if you aren't settled on those AD700s.
The Xonar DX is a well regarded card, and you can get it for a good price here:
http://www.hardwarecanucks.com/forum...take-cash.html
That Creative card you mentioned seems a little dated, but it will probobly do a good job. Auzentech has some cards that use Creative technology that are newer, such as the Bravura and Forte.
Any of the cards I have mentioned will be great for letting you hear the footsteps.