I had the previous version of the DWS for my e46 and they were great in the wet and snow. I was going to get the DWS06 but decided to go with a set of summer tires on my 135s and get 17" wheels and set it up with winter tires and not compromise.
I had the DWs prior to the DWS and didn't feel I lost any performance with the DWS (daily driving conditions with some aggressive back road driving, but no track time) and had a significant advantage in the snow.
2004 330i E46 with ZHP performance package and cold weather package