Dalmango mate, you need to really drive the cars to get the feel and to understand what you really like. I had and loved a BMW 530D, it was my first RWD car and I REALLY loved her and drove all around Europe, 180 horses in those days was LOADS for a diesel. Then I bought a front drive A5 and enjoyed her too, but since I bought my 4WD S4 oh my goodness!!. Personally I am a massive fan of big, normally aspirated engines cos as they say there is no substitute for cubes and I agree. The A5 is NOT a harsh ride in my opinion but you must try it cos it depends what you are used to......