Thanks for the comments, all.
The vocals and guitars I wasn't actually involved in the tracking of (client did them on his own). And the vocs, unfortunately, were kind of a disaster to begin with -- were recorded with a really harsh-sounding later model NT1 in a very bad room (sounded like he was doing it in a bathroom or something), although the rap section was recorded REALLY WELL, I thought. Same with the guitar tracks, although the performance was so good, I probably wouldn't mess with it.
Crawdad, you are my dali-lama of recording technique. I owe my tripple tube / three-stage tube emulation to exciter technique to you.

Hey, thanks for pointing out the Right-channel / Left channel difference. That kind of stuff really helps. And thanks for the compliment on the drum sound. I just got done with my drum room and this is my first time tracking in there. Of course it doesn't hurt working with a kick-ass drummer. Just point the mics and have him go at it.

I need to do something about the crash, though. It gets out of hand in a few sections, I think.
Tex, thanks for the input. My next job is to convince him to re-track the main vocal tracks with me. I LOVE the bass guitar sound, so I should play around with getting that tighter with the kick.