Lee Iacocca http://en.wikipedia.org/wiki/Lee_Iacocca (for those who have never heard of the man)
--I think he'd have some interesting stories if nothing else given his time in the business. I also think it's a 'never going to happen' but whatever
Jay Kay again... I find him amusing. Even in the Lamborghini drive back in Series 3, he was entertaining. Truly passionate about the cars, and that's a wonderful quality.
A rally driver of some sort, to see how they stack up to the F1 drivers... maybe S?bastien Loeb... or Tommi M?kinen or Marcus Gr?nholm if they can't find an open Wednesday for an active driver. They've had a few rally drivers around the show in the past.
As a greedy option, I'd love to see Jackie Stewart's time in the Liana... and to regale a few stories from the past.
Another vote for Matt Smith and Karen Gillan if they feel like it.
Daniel Craig (just before Bond 23 starts shooting)
Jay Kay and Cowell, ideally on the same show so they can rip into each other and go head to head!
And Viper007Bond vs Quiky. RWD n00b vs LeMons veteran! Best SIARPC Evar!
You'll notice a pattern :
Michael Gambon (I'd love him to be the SIARPC on every episode but...)
Emma Watson (Just to look at her for 7minutes-And in a helmet)
Alan Rickman - Ralph Fiennes or Gary Oldman (To have a massive actor)
Another Stephen Fry ? To stop the American Hollywood Star trend and treat us like actual intellectuals.
And I agree, Angelina would be cool. (With a little taunt on Richard since he craved for her to be on)