If you want 700 tires and disc brakes (they are much better for rain) I think you should get a cyclocross bike with disc brakes. I bought a frame from Airborne (carpe diem) and built one up from there with Avid road discs. I also have fenders and a rack. Since the frame is aluminium which is stiff and transfers road vibration, I used a carbon fiber seat post, front fork and handlebar to take the vibration out. I went with slightly fatter tires than my regular road bike for a little more traction in the rain, it makes more friction but grabs better in moisture and can handle pot holes better.