You really want a 2008 MY with the 177 engine. It's much better. Think you may get one from 57 reg onwards. I've got both a manual 320 and an auto 520 with the 177 engine and can't fault them.

Not sure I believe some of the MPG claims above. Something in the 40-50 MPG is more like what you will see from a 177. Slightly less on an earlier car.