For warm weather, there are other, perhaps even better choices, but for rain/winter - Salmon all the way.

Though I use them all year long. On long descends, overheating can be avoided with hard (as hard as safe and comfortable), short braking, instead of feathering the brakes for longer. Also, good thing is allowing the speed to reach maximum of your safety and comfort zone, while staying more upright - letting the wind do your braking as much as possible.