I personally chose the Yamaha card because it's so quiet compared with the average Creative Labs card, and it's got the real OPL chip. I used to consider crappy audio with vintage computers part of the experience until I started watching some of Phil's videos where he's gone to some effort to get the best sound quality out of these old games. It's impressive, and it doesn't seem to require spending a lot of money, especially if you have access to a cheap device for things like MUNT and a good MIDI interface for older titles and a good sound font with a soft-synth for newer titles.
If I could find something more compatible than the Yamaha that sounded as clean as it does, I'd probably pick one up. I don't recall the AudioDrive being a particularly quiet card, although I've only really seen Creative's rendition for comparison.
A noise comparison would be great--but cards made by folks like Yamaha, Turtle Beach, and Roland are going to win out. But then, I remember having a Turtle Beach card back in the day and it was awful for games compatibility even if the music sounded great. *shrug*