Just wanted to put my opion about the 540i/6.
I have had my 2000 540i for about two weeks, and I LOVE the car. I upgraded from a 99 328i. The 328 was by 1st BMW and I have fallen in love. In fact I have put a deposit on a 2001 M5.
I find excuses to go out driving usually late at night when the roads are empty. This care handles beatifully. You can cruise at 130mph and not even feel it.
Anyone that is considering the 540. JUST DO IT! The only questions would be what options to get.