Hi Girls! I bought a new pair of boots. After skiing on them a few times I know I need to fix my liner. My old boots had the surefoot foam and they fit beautifully for many years but I have been told the Zipfit is the better way to go these days. I'm torn because yes I liked the surefoot but $675-$750 vs $400-500 for Zipfit is nothing to sneeze at! Any suggestions? Any input is greatly appreciated!