I too have heard bad wet weather reviews for the DWS Contis, however have read good things about the DW Contis. They seem to have a bit softer sidewall and flex a bit but reviews seem to indicate they feel really well and are pretty communicative near their limit.
My biggest concern with the Michelin Pilot lineup is the often complained about noise they produce, whether it be the PS2's, or the original Pilot Sports. I will admit I hadn't looked into the PSS's yet, maybe they dont have that problem as badly? I really don't care too much about noise, but if I can get a slightly quieter tire with similar performance to another noisy tire, that would be my deciding factor over price.