Well, I find that the amplifier presets work pretty well for pop music and movies but tend to bully jazz and classical tracks. I'm not too familiar with the technical terms but I guess I'd say the highs and lows are overstated. Particularly orchestral music. I can get by adjusting bass and treble but I think an equalizer might be better.
Also, my cd player is really old. It makes a clicking noise after a while and really must be replaced. I was hoping for suggestions on one that played mp3's.
You should be able to override the presets and set in the highs, mids and lows your self. Aside from that I can see a eq being more trouble than it is worth. You would have to run it through your pre/post channel, and then (somebody correct me here) you would completely bypass the pre-amp in the receiver, and you would then need a separate unit?