the wheels would look nice ac schnitzer comeus out with a lowering kit but i agree, the new x5 is bigger and those wheels suit the e53's better. I would stick to the bigger stock bmw wheels, they do a good job!

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" Despite its supercar attributes, the M5 still doubles as a soberly practical, spacious saloon - only with the ability to scare four passengers in comfort all the way to the local coronary unit". Top Gear