Don't know much about the v-rocker but for your preferences I'd recommend getting a traditional cambered board. They're much better suited for speed, carving, and popping than rocker boards are. With size 12.5 shoes/boots you'll need a wide board (they're marked with a "W" after the board length for most brands. It's pretty wide open as to which brand to buy since there are about 30 good brands that sell quality boards. For your first new board, pick something out that's wide, cambered, probably medium stiff, about 158-163 cm, and middle of the road price range ($380-$500 retail).