I've got a Volvo V50 2.0D. It's stylish, reasonably roomy and its performance, ride and handling are great. One of the clinchers when deciding on it were the front seats and driving position - the seats are really comfortable on long journeys. It has lots of other nice touches, but there are signs of Ford's cost cutting in a number of areas - not so good.
I had a Golf diesel estate before, and the build quality was better, although ride, handling and seats were not as good. I don't know much about the cost of the V50 version you mention, but pound for pound I would go for the Audi. If I have another chance to have a company car, I think I would go back to VW (or Audi if available). One other thing - the standard of aftercare from my local VW dealership was better than Volvo's.
Hope this helps.
Les