I'll be riding on the TransAm thru Southeast KY and the mountains of Virginia on a tour I'm planning during the month of September next year. Who makes a good riding jacket, at a decent price, that would work well for that time of year and altitude. I'm sure there are a number of options out there but I'd like something not too cumbersome yet will still break the chill and repell rain. I'm interested in the Pearl Izumi Vagabond Jacket. The sleeves unzip to convert to a vest and that would be handy. Any one have any opinions on it or suggest any other options? Thanks for all your help.