E60 M5 is a great car (old man had one for 3 years) but let down by a horrific gearbox.. Although they are weapons power wise, the power isn't very usable due to high gearing and it's high revving nature. You can only enjoy the power legally in 2 gears before becoming on the wrong side of the law and there is another 5 gears left..
Did someone mention S/C'd E9X M3's....