I've got the new shape Volvo V70 2.4T (200hp) - I think the T5 has 250hp. And yes, Alan, I'm afraid to admit I do have a tartan travel rug and a labrador!! I have to say it's a massively relaxed tourer and remarkably refined and the 5 pot engine is a real beaut. However, the problem with T5s has always been shedfulls of torque steer, although that may not be such an issue with the 4WD version. As DanielTD5 points out, the other major issue with Volvos is depreciation - mine cost £27,000 three years ago and has a partex value of around 3K, albeit it's got 88,000 miles on it. Thankfully it's a company car
Furthermore, Volvo parts and servicing are renowned for being a preposterous rip-off - I regularly get bills of £600 for routine services.
I would go for the Audi A6 if it was my money, although don't think you'll be immune to huge parts and service bills and like all cars of that ilk you'll suffer large depreciation too, although not at quite the rate of a T5. VW Touareg - forget it. Very accomplished car but they've sold about 2 in the UK, everybody hates their looks and it'll be a nightmare to sell on. New Discovery looks nice, although as with every new Land Rover product, I'd give it at least 18mths for them to sort out the inevitable teething problems and even then I'd extend my 3yr warranty cover.
By the way, how on earth does Audi justify £750 for a tow bar and BMW £890 for same? Factory fitted towbar on my Range Rover was just on £500 quid and I know which one I'd trust first.