Wedding Car

Yes I know it is very bizarre to ask this in a forum but even after 5 weeks of thinking I still can't decide.
My friend (23 years old I guess) asked me to be his "best man" so I have to organise a car. A rental service only for classic cars has got two very interesting cars to rent: A 1964 Rolls Royce Silver Cloud and a 1959 Cadillac DeVille (4-door hardtop in black exterior). Both are excellent cars. What would be the car of your choice?
The RR of course is the more "royal" and might be appreciated more by "normal" people but the Cadillac is more majestic, better looking and loooooooooooonger (you know, bigger is better).

I want to rent the car a soon as possible that's why I ask early.I would jump at the chance to drive a hand built car. Kim