A friend of mine came around last night to show me his new purchase, a 2 and a bit year old 740Ld with 43k miles, which he picked up for £30k. It's a HELL of a lot of car for that money!
We spent an hour or so bimbling about in it trying out the different modes and it really is a lovely thing to drive, or be driven in. Plenty quick enough (though subtle about doing it), reasonably sharp to drive about in Sport mode and exceptionally comfortable in Comfort Plus, really soaking up bumps and undulations in the road surface, plus Adaptive Drive is clever though it's very difficult to tell exactly what it's doing. The massage seats are funky, rear leg room is hilariously good, rear seats recline too and if you're sat behind the passenger you can move THEIR seat as well for even more legroom!
It's obviously worlds apart from my M3, but I didn't half feel tempted to look after spending a bit of time in it.