THe SBLive is one of the biggest pieces of crap I've ever bought.
With the Vortex2, you get AWESOME 3d sound in games. My dear god it sounds great. Plus, I loved my card simply because it had a functional headphone jack, set up specifically for the headphones.. SBLive does not.
I got rid of my vortex because it didn't do A3D in Windows 2000 and I figured the SBlive would.. WRONG. EAX Is so screeeewwwed in 2k that I have to boot to Win98 just to use it. If I'm going to do that, screw it, I might as well go back to the vortex. I have to run the Live in plain stereo mode in 2k, so the vortex will sound the same, and if I want to CORRECTLY play games like thief, I'll have to boot to 98 anyway, so I'd rather have the vortex.
Just ordered another MX300 for 30 bucks shipped. Not too bad and I can't wait to have games sound good again. Creative blows and I hate them for killing Aureal.