No offense Siaf, but the Audigy 2 ZS Platinum card I have has been perfect in every way. Low CPU usage, and stable as can be.
I have one other sound card which sounds better, but it is a $1500 sound card and does not have any DirectX support.
The ASIO drivers, from Creative, have been outstanding as well. But to record at 96Khz using them, you need one very fast system or you end up with gaps in the sound.
96Khz sample rates through DirectSound is not problem though. ASIO just puts a lot of stress on the hardware in the computer, in general as it is as close to real-time as we can get in computer sound.
The only nit I have about it, is setting it up for external clocks so it keeps sync with other devices. By default it is not setup that way. No biggie if you know about it.
The only people I know who have any troubles with any of the later SB cards are all AMD owners. I have no experience there, but I think it says something.