I see you have had no responses yet. Here's my $.02. Ive been researching the same things and have decided to get the DWS. I live north of Seattle and will be purchasing later this month.
I'm in need of new tires for my 2010 Golf TDI and the new rubber coincides with a move to Portland, Oregon.
I've narrowed down my tire choices to:
Michelin Primacy MXM4, or;
Bridgestone Potenza RE970AS
Any opinions/reviews/etc about any of these tires for a wet climate?