hey, it took me a long time to figure out which springs to get for the 318is... turner lists a couple of part numbers, etc.
Long story short, I got a tip from a guy on E30 tech who had run both #29664 and #50404 springs and recommended the #29664 springs... they're great!
I will take some real photos later this week, but it's a phenomonal upgrade, nice, almost perfectly tasteful drop (even my oil pan loves it), and nearly stock ride comfort (I traverse the cross bronx), and the thing now handles even better.
I'll throw in some more notes later...