I have been renting gear (4 sessions so far, loving the sport and ready to buy soon) and am thinking about buying boots and starting to demo boards. I have rented Burton boots based on what the shops had in stock. I am not sure what to look for. The rental boots were stiff and heavy, IMHO. I tried a pair of Flows on yesterday in N. Conway and they felt feather light. Any suggestions? I am a size 6 and will be riding in New England.