do you think that all tracks in a song should be of equal width?
Unanswerable, depends on the song. But I'm sure there is such a thing as overdoing it. I think one of my songs in particular, namely "Too Many Changes", I think is a big-time overdo on the stereo seperation (even though there is no actual utilization like panning or anything in the song).
A good tip to try: When I'm writing music, I ofted have the midrange on my receiver turned almost all the way down. All I can hear is the treble and bass, and therefore I'm forced to focus on them. For some reason that eludes me, that actually helps a song sound way more meaty, even concerning the midrange that I could hardly hear while writing it.
And yeah, Sound Forge is made by Sonic Foundry, same as Acid DJ Pro.