I know of someone who has a 4200GT and an e61 M5 touring, he regards the M5 as by far the less painful to run(!)
Incidentally, he's got a RR Phantom and a 12plate Focus diesel for taking to the shops and other stuff, his parents live with him in an wing of his house, he retired at 40 having made a lot of money out of mobile phones,not jealous at all, annoyingly he's a really nice down to earth chap you'd not look at him twice driving the Focus, which he seems to use most often!