What you want is the version with both the SPDIF output in the back, and the Digital CD input on the card. I have one of these but it is the Sound Blaster X-Gamer card (CT4760, not a CT4670). This one has gold analog plugs unlike the version you get OEM, which has the rainbow colored rainbow plugs.
Whichever version you get, just make sure it has the SPDIF out in the back and the CD Digital-in on the card, Digital CD sound rocks...it is MUCH better than the analog stuff most people have. Just make sure your CD/DVD rom drive has this out put. You can't miss it, 2 pin out in the back next to the analog output.