Hi Dave, thats is a beautiful E36 !!!!!!
The only thing I would recommend is
2) tinting the windows ( legal percentage )
3) black kidney grills
4) angel eye headlights
I wouldnt put l.e.d's under the car, in my opinion it looks tacky and would spoil your car.
Other than the few things I have mentioned above I couldnt think of anything else. That is one sexy car