Up until about three months ago I would have said the same. However, when I looked over a very low mileage DB9 in detail I was very suprised at the seemingly poor material choices and corrosion.
Don't get me wrong - they look lovely, sound nice, the drive was smooth (if not particularly fast) and the interior looked great but there was so much corroded aluminium on the thing it spoilt my previous perceptions. Wheels, centre caps, under bonnet bracing and framework, engine related covers and panels etc...it put me right off and I wouldn't dream of buying one if I lived in this country due to the moisture and seemingly inherent corrosion issues.
Maybe I was looking at a bad one?
I would probably be leaning towards an R8 V10 (over the 997TT and R35) but I have no idea if the cost is comparable.