I could spend the money for a custom M5 swap and then break it (From too much torque yo!) or I could spend the same amount of money to build a bullet proof A4. I'll pick my slushbox.
With some tunning of shift points, line pressures and a good shift kit an auto is great for straight lines. A manual transmission is by far more fun to drive but don't get mad when I pass you while you're grinding gears.