At your weight I think I would go for the new Monk Forever; I have both the supershinn and the Monk Forever which I have just received this week-end. Both are the best TT i've had the chance to ride so far. They are really in a class of their own.
The supershinn has a bit more flex than the Monk so that is why I think that at your weight you will prefer the Monk.
I did a test today; in 25+ knots I tried them back to back (big chop, flat and small wave) and I prefered the monk when riding really fast in the big chop. I was also able to boost higher with the monk than with the supershinn. On the other had the Supershinn planes a bit faster since it is 135 X 41 and my Monk is 132 X 41. The supershinn is also a bit smoother in the chop.
Both are very good to carve at really high speed both can keep an edge in the rough at high speed. The supershinn might have a it more pop for wakestyle move, but to boost really high I think that the monk is unbeatable.
Whatever model you choose; I think that you cant go wrong.
From now on, only Shinn Boards for me
Monk, Supershinn and King George.