I'll say now that I'm a fan of the super-estate class.
Having spent a few days in an M5 Touring, I can honestly say that I would love to indulge in a 500bhp estate if I had the need for a comfortable family run around, and the money to fuel a car returning 16mpg.
But that's not reality. Reality is that the M5 Touring costs £66k, and a 535d Touring costs £20,000 less.
The new Audi RS6 Avant has brings this into focus. It has a 5.0-litre, twin-turbo V10 putting out 572bhp. Remove the limiter and you'll see 200mph in an estate.
But who would buy a £77,000 RS6, when you can get a 3.0 TDI A6 Avant for £40,000 less? The big diesel A6 isn’t a performance car by any stretch of the imagination, but it's still quick, refined and will do double the mpg. More importantly, you could buy a used Noble M12 GTO with the remaining cash and still have enough left for a new conservatory.