test drive the 540i/6, my dad has a 528i and it drives like a dream. The steering wont be as precise as a 528i, due to the fact it uses recirc ball over rack'n'pinion. Drive both, then decide, both great cars IMO.
R

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83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.