I love this car way too much. I recently hit 175,000 miles and its still a beast.
If this car ever wears out, I'll be replacing it with another e39 M5.
Only a few tasteful modifications:
dinan differential gears - i'll take more acceleration over the already absurd top speed of 180mph
ECU reflash - a few more horeseponies and top speed limiter removed
lowered 1/2" with Bilsteins
short throw shifter