Although Aston V8 sounds glorious, I thought the V8 lacked a bit of a punch.  

The sound accelerated faster than the car.  

I'm sure you will see what I mean if you test drive the car.  

 

I think the opposite can be true of the 997S.  

 

However, knowing UK's damp driving conditions and the rarity of R8 on the road (rarer than AM V8 at least in UK), I think this would be a great choice!  R8 still turns heads in London.