The time has come to replace my 2005 BMW 535d and this time I'm thinking of going for a petrol V8/V10. I've been looking at the Audi RS4/RS6 and the Mercedes C63 AMG. I have discounted the BMW M3/M5 as I fancy a change or marque unless I'm convinced otherwise. I've also considered the Jaguar XF but not too keen on the front look. My requirements are simple; 4/5 doors with plenty of power! I have a budget of £35k, which would get me a 2009/2010 model with relatively low mileage (don't want to go older than 2009). Anybody here have experience with any of the cars above or any other that meets my requirements?