Just looking around at stuff and wondered.......

Looking at cars around the 5k mark, which would you pick from:

High mileage (100-115k) circa 94 M3,
High mileage (100-115k) circa 90 M5,
Sapphire Cosworth, probably around 80k at this money? 4x4 and 2wd.

This is just purely a curiosity thing, with maybe a tiny bit of an eye on the future....