Which uberbarge? 760i,S8,A8 W12, Pheaton W12, XJR

[topgunkos]

I've alwasy wanted a huge engined barge to crush motorways and the above mentioned have all depreciated nicely bringing them into range. I am currently leaning towards the BMW, something about a BMW V12 appeals to me greatly. What would you choose and if you have owned or driven any of the above I'd be grateful for some feedback.