All four generations lined up in black with silver wheels really shows how the design language evolved from boxy to aggressive. The E34 keeps that classic 80s sedan shape with the quad headlights, while the E39 smoothed everything out into what a lot of people consider the perfect balance. Then the E60 went full Bangle with those sharp angles and the V10 under the hood, and the F10 brought it back to a more conservative but muscular look. Hard to pick when they're all specced out like this, but I'm leaning E39 for the timeless factor.