The Jetstream is a great jacket. For what you want, it should be good. Baselayer, mid layer (fleece, etc), then have the Jetstream. It's windproof and has a little insulation. Its very brush resistant and will do well as an all around outer layer jacket. It will shed light precip but is not full on rain gear. When you get cold, add a puffy vest or jacket underneath, if you are hot, open the pit zips and center zip. Add a rain jacket if its wet out.
Excellent piece that you will be pleased with and they are on sale most places now.
I don't currently own one but its an awesome piece of gear in my opinion.
Lee
