RS4 vs Cayenne Turbo

[.R2D2]

Can't make my mind up which one I want, the RS4 I'm not bothered if its the saloon or Avant. I have test driven the saloon but didn't get a wow factor from it. I stumbled across the Cayenne and you seem to get a lot of car for your money. My mates a Porsche mechanic and he says they are pretty robust, the only issues are tyres and brake wear.

Has anyone got experience of both cars?

[daveco]

You didn't get the wow factor from the RS4 and are now considering a heavier, slower car with a relatively uninspiring engine?

How about a V8 M3, Mustang, or even a 911S?