Thanks for the info folks.
I'm due to test drive one over the weekend, although oddly the stealer has asked me to cover the cost of getting the car from another one of their showrooms albeit refundable. Hardly a great start to the relationship but I guess it filters out the hooligans who just want to floor a 400bhp car.
Assuming I like it, and I suspect that's very likely, I need to give some thought to the age as the £31k blue one at Lexus Edgware Road (only 9k miles) will depreciate another ten grand in the next 2 the 3 years by the looks of it, which I could avoid if I got a slightly older one. And what to offer, as my guess is there are not very many people on the look out for ISFs so that has to give me some sort of advantage when it comes to the price. I'm useless at barganing though.
As we've already said I dont mind re LSD or not. myelise which is faster to 60 than the ISF doesnt have one and its not a problem even on track. I wont track an ISF. Well, maybe just the once to see what it's like!
Anyway, I shall have a prod about over the weekend and let you know what I conclude.
Dave