Richard,
I had a very small taste of something similar a while back (part of 60th birthday pressie from wife) so given the list of cars on offer for you to thrash (sorry - drive responsibly) I'm jealous as hell! I had an afternoon at Brooklands with an intructor in an AMG SL63. One step down from the McMerc but with 580bhp still very exciting. Merc have built a museum, visitor centre, showroom and tracks within the confines of the old circuit. They start you with what is basically a drag strip and return loop but with sprinklers in the braking area to see how you get on handling panic stops. With the four wheel adaptive ABS linked to a steering sensor you just make sure the wheel is straight, take your hands off and hit the brakes. The whole thing shudders to a safe stop in a straight line. Amazing. With the ABS switched off it was back to that old "touching cloth" moment in the seating department. Having mastered/made a prat of yourself for a while, this is followed by two circuits - one with tighter bends and another with more flowing open corners. I'm pleased to say that Pirelli's finest took a hammering. My daily driver is a Merc and the weekend toy is a 289 Cobra so I'm used to all the electronic gizmos or a bit of right foot self restraint in order to make sure I stick around long enough to spend everything before my kids their hands on it. It's fun to switch everything off and smoke the tyres through the corners but it makes you realise just how much electronics contribute towards keeping things shiny side up these days. And then to really make you look a dick, they finish you on a large circular track set out in front of the decking area for the restaurant and it's punters. No problem until they switch the sprinklers on!! The idea is to get it sideways and keep it that way. The reality is some of that but lots of spins to make people cheer.You'll have a ball.
Robin