Yes, they are promoting Yokohama W.Drive Winter tyres.
Prices seem to be competitive and most dealers say they are "in stock" now.
Some even have very snappy "Winter Tyre Quotation" paperwork.
That gives options such as "Tyres Only" or "Tyres & Alloy Wheels" and "Storage Required"
AutoExpress Issue 1187 12 Oct 2011 have a very good review of Winter Tyres.
Re. your Dunlop SP Winter Sport 3D
AutoExpress had a pre-production set of Dunlop SP Winter Sport _4D_ on test.
They could not rank them (because they were pre-production) but were impressed and said ".. the Dunlop is a good option."
AutoExpress did not include the Yokohamas or Bridgestones in the test by the way.
I look forward to your feedback.
But by then I'll have probably decided which way to go, which is a pity.
Argento