Need help snowboard pros! k2 www?

im 5'6 135lbs,i got a forum youngblood 152cm, its dope but i want a smaller board to do ers with usually i do jumps and havnt learned jibbin yet but want to learn tho i was looking into the 09 k2 www its dope which is better the rocker or without. money is low so help me compare would a 145cm be good and does this board handle medium size jumps? help me please. also i got the Medium size burton cartel bindings does this fit the board