Personally I think it's great that Microsoft is breaking Creative's one last hold on the gaming sound market because Creative is a terrible company. Creative has been stifling innovation in the sound card market for over 10 years buy buying out or suing into the ground all of their competitors, and strong-arming game developers into including support for their proprietary EAX API so that gamers continue to think they need a Creative product in order to fully experience those games.
I've been Creative-free for about 3 years now and haven't missed it one bit. EAX is just another layer of effects on top of DirectSound3D, so most games run fine in 5.1 on Windows XP with a sound card that supports DS3D but not EAX 4 or 5. This is due in large part to sound SDK's like Miles which make games run well on any sound hardware by giving developers a common interface for sound programming.
Breaking of legacy DS3D support is a bummer though - hopefully someone will write a wrapper or something.
I'm using onboard Realtek sound right now (works great and has good DS3D support) but I'm thinking of picking up one of these: http://www.newegg.com/Product/Product.asp?Ite … N82E16829156002 because I have Dolby/DTS digital-capable 5.1 speakers that would work well with it.