Depends on your budget, and how much importance you place on size/weight. For example, I have a dhb Southsea jacket that will keep heavy downpours out all day long, but it's so heavy and breathes so poorly that I can only wear it in the winter. It was pretty cheap, though, at £45. I also have a Montane Velocity DT 2.0 which cost £70, but it's a hell of a lot lighter and breathes much better than the Southsea. I keep it in the size pocket of my bag at all times in case I need it. The Southsea doesn't fold down very well at all, in comparison.