If you like Bangernomics then an old 5 series estate 530d (E39 or E60) would be an option, loads of spares and solid. Not too good on snow unless you enjoy looking out the side window on straights?
If you can find a well loved late Volvo 960 with the straight 6 engine and the leather interior they are sumptuous and lazy. They are good in snow!
I would be inclined to go for a newer Mondeo estate over the Jaguar as spares and service will just be that much easier for longer. You can also find 4WD versions although the engine is a bit rougher and noisy unless you go for the V6.
If you like Jags the unloved S-type can be bought for peanuts and is a great barge. Mostly sideways on snow.
