My 1988 E30 M3.
Bone stock with the exception of the 16 by 8 BBS 3-peice RS1's
Also done a full tune, nothing special but all belts, fluids (changed out to a synthetic for all), plugs, Distributor cap and rotor, Air filter, wiper blades, BMW roundels for hood and trunk and many other things really not worth mentioning. My new plug wires are pretty nifty http://gsperformance.com/products/wires/wires.htm
Also have a new momo air leather shift knob and momo competion wheel.
The next wave of upgrades will be all the bushings and mounts e.g.: tranny, rear dif, motor mounts etc
future plans include
ground control coil overs front and rear
2.5 liter big bore kit with all the goodies to go with
ss exhaust
alpha-n with carbon air box
evo front lip with brake ducts
recaro srd's or the new speed seats