Just keep trying with different mix versions, each one with a slightly different mix and eq. Then listen to them on different speakers (computer, hi-fi, headphones, car etc). You want it to sound good on most systems you play it in. You'll be able to work out which ones are the best and the worst. From that you can work on a final mix which is right.
When getting the EQ's and levels right in the project, I adjust the EQ on my hardware mixer (which the computer main out goes into). With each part in the track, I make sure that the treble is correct, by turning up the treble to max on the hardware mixer, and then turning up/down the hi-EQ of each part so that each is not too loud or quiet (in the high end).
Then I turn down the hi-EQ on the hardware mixer to 'normal', and the details should be just right, not too bright or too soft - if any parts are too bright/soft, then I adjust them accordingly, checking back with the hi-EQ turned to max to make sure they're not to bright.
I do the same again for each part in the bass/mid fequencies, turning the bass to max on the hardware mixer, and making sure that the bass-EQ of the kick/bass/low synths is set correctly. Then I bring the bass on the mixer to 'normal', and make sure that nothing is too quiet. At this point it's a matter of getting the right amounts of mid and bass on each part so that it sounds 'normal' and not too weedy (too little bass/too much mid) or fat (too much bass/too little mid).
Once the treble and bass/mid end of the mix is sorted out, you'll find that you can turn up the volume of the parts quite considerably or you'll be able to turn it up on the ouput mixer/hi-fi/amp - everything will appear to have more volume, clarity and fullness. With the mix you have at this point, you should be able to turn up the bass EQ on what ever system you play it on, and the bass/kick should be at the maximum acceptable for the track. If it's not enough or too much, then you can go back to your project and adjust accordingly. The same goes for the hi-EQ. If some snares are crisper than others or they are louder than the hi-hats, then you need to equalise the EQ back on the computer.
When you finally DO have each part equalised for EQ, if you still think you need a little more/less overall bass/mid/hi EQ, then you can probably just apply this to the project on the master EQ instead of adjusting the EQ of each individual part.
Then export your audio track to a wave file, normalise it to 95%, and stick it on CD.
K
