Why do you think he has outgrown current board? My son is 9 also and a little lighter (80 lbs?) and is using a Burton "learn to ride" board (115). He is a really good snowboarder but benefits a lot from the soft flex and bevelled edges. Before this winter, he had ridden 2 seasons, about 25 days per season. Anyway, this season I started him out on a regular 120 (stiffer, without the extra bevel, etc) and he couldn't ride it at all. Was ready to give up after his first day. I found a used Burton ltr and he was back in the groove right away. I guess my point is that it could be hard for a 9-year-old to control a bigger, stiffer board.