I just got back from my first ride with my Castelli Stelvio. The weather was in the low 30's and windy. It uses Gore WindStopper with a light fleece lining. I like it so far. It fits well, although on the small side. Normally I wear a L or XL jersey, but I had to go with an XXXL jacket. MSRP is $200, but my LBS had it on sale for 20% off. (Guy's Bikes in Feasterville, PA)
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The rider in my avatar is David Etxebarria, not me.