I was recently buying an S6 from a local garage but got "STIFFED" right at the last minute (suspect he was offered more money). Any how I've never owned an Audi before and was VERY surprised with the ride and performance of the S6.

Since losing out I've looked around at many different options but can't decide which version to go for. Have a budget of around 14-15k

Any insight into these cracking motors would be greatly appreciated !!