I'm curious, what is an SQ2500?
The issue I think is people have different tastes in sound they consider to be quality. What makes me love the SB Live goes way back to 97 or whenever it came out. I had been playing Baldurs Gate with my onboard sound card that was the equivalent to a SB Pro. Then I put in my Live Value and I heard very subtle sound effects I couldn't with the cheap predecessor. Specifically it was a wind chime sort of sound that quietly played after the main sound effect when healing spells were cast. Higher pitched sounds just have a certain clarity and crispness I haven't heard on any other sound cards. Even playing with the EQs has not done this. That's why I have been sticking with the SB Live. Of course, Creative should take a few suggestions in terms of support. I know this is an old line of cards, but no driver updates since like 2000? That's ridiculous. And the knowledge base on the website is worthless.
Oh well, to each his or her own. It also can depend on which cards work with certain hardware configs. The Live works fine, MX300 worked fine, Audigy 2 was a terrible failure that destabilized my entire system. Go figure.