I can't tell from the pictures, does the Jag still use a different colour for the c pillars? Looks good in black anyway.
I think I'd still go with the Lexus, if for no other reason than piece of mind. The S- class certainly looks to be a moon-shot kind of car though. I'm still a bit bitter about Jag's current styling, but it's not a deal breaker really. Not interested in Range Rovers. The Porsche is an interesting vehicle. I get the impression that they're a bit star crossed as far as electrical issues.
Very good write up guys. Well done!