I think a very valid point that needs to be raised is the quality of your recordings. Myself, I am using either FLAC encoded cd's or EAC using the alt-preset-standard setting. To clarify a bit too, my EMU-0404 is also modded.
Edit: Also, you do not have your gear listed in your profile, so which headphones and amp (if any) are you using?
Edit: Also, you do not have your gear listed in your profile, so which headphones and amp (if any) are you using?