If you have read any of my post, you know I typically suggest longer boards than most people - however in this case I suggest the 156. From what I've ride the Hovercraft is wide (slower edge to edge), stiff with a super shallow sidecut at 9.3m for the 156 (doesn't like to make tight turns). All of that says a 160 is not going to be very maneuverable (again I almost never say this about boards... even the Rad Air Tanker 172cm I used to ride).
If you go to the Jone website... you will see that even the 152 is rated up to 220 lbs, so I think you'll be fine on the 156.
The board has some taper (10-15 mm IIRC), that is going to help it feel faster edge to edge, plus you'll be riding poder on it. I don't care for wide boards on groomers (I have a size 9 boot), but they are great in poder.
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