Depends on your mileage, I don't do alot so bought the best I could find. One that rolled into a bag etc. If you do rocketship miles buy cheap and replace often, otherwise buy the best the bank manager will allow
Oh and go along in your full kit so you can see how easy it is to get on and off etc and how good the fit is. Some can be tight on the knees if you have sliders, others are tight accross the shoulders making it hard to get on
