18: BMW M5 Estate
The BMW M5 is sort of the go-between in the 3-Series and 7-Series lineup. It offers a happy medium of size and performance that you won’t find anywhere else. The exterior looks of the car have aged quite well, and it’s not outdated by any means. The 5.0-liter V10 Engine pushes out a masterful 500 horsepower. Needless to say, the M5 Estate is far from a stately vehicle, and there is an unlimited supply of aftermarket upgrades that you can purchase for it.
The wagon never made its way to U.S. shores, but there are a few that have been imported. The M5 Estate is perhaps one of the most underrated station wagons of all time, serving up a serious amount of performance. Wagons are not generally the first segment that you equate with performance, but the M5 Estate changes that perspective.