I wear the 3-Flow Performance Series jacket during the winter; it’s plenty reflective, and I’m satisfied with it. (It’s also waterproof, and it breathes pretty well — although when it’s warmer than 65 degrees or so, I switch to a lighter jacket.)

Anyway, Jason’s recommending a Carhartt vest designed for construction workers. Check it out on Carhartt’s site; Jason got his here. From a brief scan, it looks like the vest is retailing for around $35.