Yes, I have offered the opinion that soft shells made with Polartec Power Shield can be a little warm when temps get above 40 F. That聮s not cast in stone; they聮d be just fine on days when it聮s 46, misting, and blowing 20 miles per hour.
REI Mistral Soft Shell Jacket
Mistral Soft Shell JacketI think REI聮s Mistral ($139; rei.com) is just the ticket for what you need. The Mistral uses Polartec Power Shield, but it聮s a lightweight version of the stuff (and also has a little less stretch). It has a woven nylon face that聮s highly water-repellent and nearly wind-proof, and a brushed lining for a little bit of warmth. I聮ve flogged the Mistral a few times since acquiring one last fall. I used it all winter for nighttime mountain biking in 30- to 40-degree weather, including rain and snow. I聮d wear only a light or mid-weight wool T-shirt under it, depending on conditions. And, along with tights, gloves, and a beanie under my helmet, I聮d be extremely comfortable. I聮ll use it for some hikes and climbs this spring.
A good alternative to what you have in mind is the somewhat more old-fashioned 聯wind shirt.” That聮s a breathable, wind-proof (hence the name), and somewhat water-repellent piece that has the advantage of being lighter and usually cheaper than a soft shell. Marmot makes an excellent one: the updated DriClime Jacket ($100; marmot.com). Its brushed lining is similar to that on the Mistral and feels good next to skin, not cold and clammy.
Lastly, I聮d go hoodless. Hoods add bulk, weight, and expense. I much prefer hats.
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