Given my liking for older cars, I would much prefer an R34 GTR over the R35, I am not all about hammering up to it 100mph+ in under 5 seconds with launch control everywhere - clearly its subjective but the R34 looks stunning from any angle, the R35 looks like a human left a computer to get on whilst on a coffee break and came back and just took what was on the screen. R34s are just that much more rare and will be much more desirable in future.
Failing that, would go for an Exige, still rate my lowly little 2.2 VX220 as the most raw and exciting car I have ever driven, it felt like I was driving a formula 1 race every time I sat in it. I can only imagine what an Exige would be like...