Thank you UCF3. Ideally, yes the LS460 should be the car but I am a bit puzzled by the difference they have here in Canada and the ones they have in Europe. I went to the dealership in New Brunswick, Canada and they seem not have heard of the soft closing doors on the 460. Furthermore, the level of noise that filters inside is not acceptable for such a car. That kind of turned me off the 460 in Canada.
I had owned the LS 400, and all the series of the BMW before I moved to Canada but never needed the awd where I lived before.
The 430 I own in UK has ample space but the new 350 they have here is cramped. Maybe the older models may have better space? I get a lot of snow where I live. Close the 160 cm to 170cm some winters. The temprature could go down to minus 36C and the average would be about minus 18C.
I have a SUV that has 4x4 that I chose when things get really bad and have to get out but did not feel that I could buy and keep a car in the garage for just 6 months of the year.
I guess I would have to go and look for an older model( maybe 2007 or 2008) GS and check it out for the rear seating space.