I'm hoping to buy a new fork for my Kona Nunu. A bicycle mechanic recommended that I purchase a RockShox TK 30 Gold fork - does anyone have any input? I have a mountain bike but use it mostly for commuting and light trail riding, and I would like to be able to lock out my suspension when I'm just riding on pavement. Many thanks for any tips or advice on what to buy as my old fork doesn't lock out anymore.