Width might not be such a bad thing. The exocet cross 118 that everyone raves about is 70 cm wide.
Have you tried the starboard Aero yet? It I rode the Aero 117 in choppy waters and it was well behaved and turned like a waveboard despite it's width. Seems like the ideal waveboard for a super heavy guy. Sicne they haven't made them in a couple years, you might be able to find one cheap.