The FPS2000 is an excellent set of speakers for the price (had one myself), but I believe it will only do digital output via Creative's digital din with the SBLive series of cards. You can try it with the versa jack, but no guarantee that it will work. The flipside to this is that analogy should sound just as good.
As for myself, I'm very likely to pick up a SC today to replace my aging X-Gamer. The primary reason for me opting for the SC instead of the newer Audigy that's about to hit the shelves is because of my existing speakers. I have the ACS56 which does have digital output via RCA jack and the SC is suppose to accomodate this very nicely albeit front speakers only with analogy for the rear.