Simon 
2005 BMW 5 Series Sedan 545i 4dr Sedan (4.4L 8cyl 6M)
A step up
 I traded in a 2003 525i to buy the 2005 545i.  While it has taken me a little while to get used to the new styling, it has taken no time at all to get used to the sheer driving power and pleasure of the 545i.  Über-responsive and just terrific fun to drive, I am very happy with my decision.