The simple answer: Emu 0404 and Audiophile 2496 are your best bets.
The more complex answer: See if you can find an Echo Mia MIDI, Audiotrak Maya44+ (rare), Digi Audiomedia III, Emu APS, Echo Gina (20 bit) or Darla (20 bit), or maybe a Terratec EWS88MT. They're all good cards and can be had...