Regarding color,
I'm sure it's on the site but I wonder what the most common/uncommon colors are on the e9's.
of course people's tastes are different ... so your mileage might vary (so don't take offense if you have one of my not-so-favorites as a good coupe done well is still better than most cars regardless of colors) ... but here's my take.
lets see, some of the less common colors and some of my personal favorites - 22 inka, 02 colorado, 70 golf, 08 ceylon, 72 taiga, 71 agave, 36 riviera blue, 58 bristol, 65 turkis
then you get into some of my not-so-favorite / but not so common - 44 pastelblau, 01 nevada, 66 florida, 55 anthracite, 23 granada, 25 granatrot, 79 mintgrun, 78 jadegrun, 76 amazon, 68 tundra, 09 sienna (some are pretty rare - and i have only seen the color on another bmw)
very good colors - perhaps not as common - 85 chamonix, 06 sahara, 42 baikal, 41 atlantikblau, 86 schwartz
most common - 60 polaris, 40 nachtblau, 37 fjord, 24 verona, 21 malaga,