Thanks for the suggestions. I was planning on taking the mud guards off this weekend. I think the car will look much better without them, their function is somewhat limited anyway, and I peeked under them at the paint--I want to save it before the marks become permanent.
I'm also more seriously considering the sways than I was before--I keep hearing that they make a significant difference in cornering (though I've already got an improvement simply from lowering the car).
I'm also planning on putting on a BMW M5 lip spoiler, those are GORGEOUS on our TLs (I'm sure you saw the thread at that OTHER site, I know you did, Songoku) and some tinting.
Was considering engine mods but with our weak tranny feel that those are unneeded.