Well, if you can't get the Soundstorm working right...
Go with an Audigy 2 if you game mostly.
But, if you do other things than just game, the
M-Audio Revolution 7.1 is an option. It used to be about the best all-around consumer-level card for audio work and playing some games every now and then, mostly because of the ASIO drivers. However, with the introduction of the Audigy 2 series, Creative Labs answered the call of competition and included ASIO support in their drivers.
With this in mind, stability of the drivers is the only thing that comes to mind to differentiate between the cards, other than the obvious lead CL has in the gaming arena (because of the EAX advances). M-Audio's drivers are rock-solid. I don't know about the new generation of Creative Lab's cards, but I haven't had a very good experience with them in the past, and I haven't heard anything but negative comments about the stability of their drivers for even the Audigy 2 series. Of course, those experiencing problems are usually the most vocal, so...