Yes he's super heavyweight, and in isolation 144 is the board. But:
1. He already has a bigger board (Formula)
2. He already sail a 130lit board (and he doesn't complain about volume from what he says)
That's why I recommended 133. But that isn't available.
If the choice is only these two boards, go for the AB although I don't know that board.
2007 iSonic will be too much "free formula", less real slalom I guess