I have an E53 and it has never suffered from body roll. It goes around corners as fast as a car. It will throw you against a door, but that's 'G'-force or a loose seatbelt, not the car rolling under cornering loads. The E53 suspension is supposed to be stiff precisely to stop roll so that it does handle like a car. If yours is 'rolling' then something is wrong.

If you want to experience proper body roll, try a Landrover Discovery, or a Range Rover!! They both lean horribly around corners.

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Me:
Current: 2011 E71 40D Vermilion Red/Beige Nappa

Wifey:
Current: 2012 R80 Countryman SDX Green/Cream