I have a set of Continental ExtremeContact DWS(Ultra High Performance All-Season)on my LGT, quite like them (8,000kms now). Very quiet, confortable, excellent wet weather behaviour and should be very good in the snow the reviews say, hasn't snowed here yet.
What is said about the soft side walls is true, increase tire pressure a bit and in a week you won't really notice. Of all the all seasons I have run (lots of set up here in Canada over the years) I have the most faith in these and will buy a set for my wifes car when hers are due.
There are higher performance all seasons available but less capable in the 'all season' departments as the DWS. As a bonus they are fairly cheap too.