I should have mentioned I really don't want a vehicle older than 3/4 years old.
Thanks for those comments Goosey as I will also be looking at a New Audi S3, 0-100km is similar to the S4 (S3 5.0-5.4 sec, S4 5.0-5.1 sec which I assume it is all weight related with the S4 being 250kg heavier than the S4.
As I said above the end goal is the AMG, if I need to wait a few years I am happy to do so, I just need to find what fits for those couple of years