I was seriously considering an E60 M5 a year or so ago, the way the prices have dropped makes it even more tempting, such a fantastic car.
the only bad thing i can ever see wrong with them is the fuel cost and the MPG they return.
For me it would take the pleasure out of owning one as they are generally in single mpg figures

And they are now an affordable car to own, but i dont think for me they will ever be affordable to run.
One of the key points abiout the F10 development was fuel economy.So if that has improved the new one will be a real winner, sadly at over 80k, its not really an option yet