This is the problem... i had a remapped E46 330d... and loved it and thought that was the perfect car for us ... but she has her mind set on the A6 - and liked it lots. So have relented as its her car and hey - less earache!!
MPG - well we get 24mpg from the disco - so 40mpg from the audi will be
As an aside - we had the disco remapped via bluefin. Called them up to see how much a new remap will be as we have the device - and the answer was because we have had the unit less then a yr (bought last Dec) a new map for the Audi is free - i just need to pay postage of £7!
Rather happy with that.
(BTW - 330d touring was best car i ever owned - enjoyed it more then my E92 335d)