Rolls Royce Silver Shadow/Spur/Sprit advice

Hi,

I am considering a Silver Shadow or Silver Spur/Sprit as my next car,
and wondered if any owners on here could answer some, Rolls-Royce
newbie questions.

Firstly, I have noticed the (in the UK where I am) that there isn't
much difference in the prices of Shadows and Spur/Sprits. I was
wondering why this is? As I would have expected the Spur/Sprits to be
higher, as they are newer. So is there some reason why they go for
around the same price? Are they not as good as Shadows? Or is it that
the Shadow is getting more collectable?

I have also noticed recently that there are now a few Corniches also
around the same price as Shadows, they were always higher priced
before, again why is this? Has the general price dropped due to the new
Phantom on the market?

At the moment I have a large BMW, and although being a big luxury car,
when you want it to go fast it will. Will I find the same from a Rolls
Royce, or will it be slower?

Finally, can you use a Shadow, Spur, Sprit or Corniche, as an everyday
driver? Are they reliable, etc? (I am not concerned with MPG)

Thanks.