I have a Sony SCD-CE775. It kicks my revo's ass. It rubs the revo's face in mud. It stomps all over it. Midrange tone, warmth, bass quantity, all more balanced, and richer. Most of all, the my cd player has a much more realistic sounding soundstage than my revo. The revo is flat in comparison. I paid $90 for this cd player, and it plays sacds, and was cheaper than my revo. Now, you're saying that the NAD 521bee is only on par with the revo? That's pretty shocking. If you can still find a stock version of my cd player, go for it. I guarantee you it'll spank the revo HARD.
I hope that EMU card really smokes.