I dont know about you, but to be honest the E39 M5 has something special about it..
I have had mine for over 6 years now, and I still love everything about it, dont get me wrong when it comes to engineering the E60 & F10 are better..
BUT, and thats a big But! The E39 is by far the prettiest M5 made..epsec when its in Carbon Black.. obviously i am biased..
By the way have a look at the new M5 on a race track F10 M5