I am of the opposite opinion. I drove a 540i Sport with multiple Dinan upgrades. Incredible car, loved it. Then I bought a 550i Sport (E60) and I love it even more. Took a couple days to get used to the different "feel" of the car, but there has been no looking back. Absolutely fantastic car.
Originally Posted by Sophisto
I owned a E39 528A Touring for 5 years.
I still am sorry for ever trading that car for an E61.
Next up, I'm going to buy either an F10 550 or an F13 650. Hence my hanging around these forum.
2013 550i Space Gray, M-Sport--del Dec 2012
2013 X5 5.0 Orion Silver--del Dec 2012
2009 X5 4.8 White (w/hitch)
2007 550i Monaco Blue, Sport
2004 X5 4.4i
2003 540i M-Sport w/Dinan mods (last of the great E39's)
2002 X5 3.0
2000 540i Sport
1995 525i Sport