I always think of trading up to a 540. but i have too much stuff into my car to let it go. OEM Style 65s and OEM front M5 bumper and just intalled an OEM M5 rear bumper. Its not that big of a diff for me from a 530 to a 540 considering my car looks 10x better and is in better condition than any 540i i have seen for sale. I do plan on one day buying another e39 but its not going to be anything other than an M5 thats for sure. And who ever said the 0-60 time between 540 and 530 is 2 seconds... i never knew 540s broke into the 4s... its barly 1 seconds man lol. go do some research.